I'm with OP on this one. Did Wish in August and Fantasy in October, and the Wish was the overall better experience. As for the objective/subjective game--you can really twist it any way you want--allow me to play....
Objectively the adult pool area is a joke compared to quiet cove and Satellite Falls. There is no shade in the adult areas and the Cove Cafe has been stripped of its free snacks unlike on the Fantasy.
Objectively, the adult pool area on the Wish is open with panoramic ocean/island views and breezes, whereas the Fantasy adult pool are boxed in encased in plexiglass. The adult pool is not in the shade on either ship, and the hot tubs are shaded on both ships, so those are equivalent. There is in fact shaded seating in the Wish adult area outside of the cafe--I enjoyed a nice coffee there. Never did manage to get seating (shaded or otherwise) on the Fantasy--in 4 days on the Fantasy, staying on the 12th floor and walking past the adult pool area probably 20+ times per day as it was right outside our room, I never ONCE saw a single open lounger during open pool hours, and the pool was full of loud adults constantly. On the Wish, the secluded location was admittled not easy to get to, especially on a rainy day, but that meant the pool was often empty and open chairs were plentiful. Cove cafe on the Wish does not have free snacks, but the food at the outdoor pool deck was far more varied and interesting for an adult palate, making snacks on the Wish all the more delicious.
Objectively the activity spaces were poorly planned. Tritons Lounge is far too small compared to the D Lounge (the fact they attempt to hold the Family Quest in there is absurd as there is no room). Luna is problematic because it's noise spills into the Pub and Tritons because Luna lacks doors on the balcony. Also it is uncomfortable to me as an adult to attempt to enjoy some of the more adult humor of Match Your Mate as kids stroll pass or a sitting in the balcony during it. Objectively it is easier to keep kids out of the adult area in the evenings when it is in one location.
We did family quest on both ships and both were equally crowded, and neither one had "no room" to play. Except now that you mention it my kid did trip and fall and bang his head on the Fantasy running up the length of the room to the stage, so I guess the Wish wins after all as we could turn in our scavenger items without sprinting in our pirate costumes. Pub and triton had doors that sealed them off from hallway noise. Any noise when the door happened to be open was equally present on the Fantasy in O'Gills or Oooh la la when we would catch bits of music and chatter from La Piazza when the doors opened. On the Fantasy and the Wish, we saw children present at all adult locations except Palo. Children were definitely more common in the adult pool on the Fantasy, since you can't get across deck 11 or 12 without walking past it, and I many overtimes overheard some very adult conversations and language in the pool. And we routinely saw kids in the adult district at night, walking through the promenade doors or from the aft elevators to or from the dining rooms. La Piazza has no doors either.
Objectively the Fantasy also still has a late night snack station in Europa and Happy Hours at the Lounges. The Wish offers neither.
I attempted to sample the late night dining snack station in Europa. It was nearly empty and picked over 5 minutes after it opened. I opted to go to the top deck and get a late night slice of pizza instead, just like I did on the Wish, where that is also available. Both pizzas were delicious, but the Wish's pizza was better. I went to a happy hour on the Fantasy and had a cocktail so bad, I took three sips, paid and abandoned it. The experience was pretty much the same for full priced drinks on the fantasy--ever drink was either the harsh flavor of straight moonshine, or sickly sweet syrup with no trace of alcohol. Every drink I had on the wish was delightful--well crafted and balanced. Whether you enjoy a happy hour is subjective, not objective--to you, it may be better to pay less for drinks, for me, I prefer to pay more and get a better drink. The drinks in the Rose, the Bayou, Hooks Barbery and Nightengales were all subjectively better, IMO, than any bar on the Fantasy, and subjectively much more beautiful setting. For those seeking a discounted beverage, both the Wish and Fantasy offered pretty much the same drinks of the day.
Objectively when they announce your family on the Wish they do not have the crew there to clap and greet you like on the other ships... You do get a wishing wand though so maybe that is a wash.
We were welcomed and announced by the crew on both the Wish and the Fantasy.
Objectively there is no mini golf on the Wish.
Objectively there is no indoor hero zone shaded from the elements with air hockey, cornhole, foosball, table tennis, and at times an inflatable obstacle course, on the Fantasy.
Objectively the teen club Vibe is much smaller on the Wish and lost the pool deck they have on the Fantasy.
Objectively, there are on average more kids age 3-10 on a given sailing than age 14-17. Objectively, the Oceaneer's club on the Wish has far more amenities than the Fantasy's--it's probably the most impressive space I've seen on any cruise ship, ever.
Objectively the Fantasy also has two different splash pads including one gear towards older ones to keep them out of the one geared towards littles.
Objectively, there is an age limit of 6 for the splash pad on the Wish, and we saw it repeatedly enforced, so there were no older kids in the way of the littles. Subjectively, I hope they eliminate the Fantasy's Aqualab in a drydock someday soon--I don't particularly enjoy trying to supervise my kids while getting blasted in the eye by high powered ice cold water jets, then applying bandaids when they inevitably slip and fall while running around in said water jet. Objectively, the Wish has more pools for the older kids so they aren't shut out when one of the little kids has an accident in one of the two pools on the Fantasy. Objectively, both ships have a water coaster and a smaller body slide.
Subjectively many would argue the Fantasy has the best crew and some of the BEST Adult entertainment hosts (Emily and Yoyo tend to kill it)
Objectively, crew change frequently. Ashley was our cruise director on the Wish in a previous year and was the director on the Fantasy this year (she was awesome on both ships). Subjectively, we preferred the crew we had on the Wish--our dinner servers did magic tricks, unlike our dinner servers on the Fantasy. Subjectively, we enjoyed the entertainment staff for things like trivia and bingo the same on both ships.
Subjectively I agree the pirate show is better on the Wish but I would also argue the Fantasy has better theater shows but again thats up for debate. However most can area the seating in the movie theaters on the Wish is much more uncomfortable than the on the Fantasy.
Subjectively, we like the shows about the same. Objectively, the Wish has two theaters, allowing two shows at the same time so you have more options, and more chances to see a particular movie you want. Subjectively, I never want to have to shimmy in a painfully narrow row past dozens of people to get to my seat in the Buena Vista theater on the Fantasy carrying 3 kids' worth of drinks and popcorn again--subjectively, I loved the smaller theaters on the Wish.
Honestly, it's all just one person's opinion in the end. Yes, the ships have objectively different features. You can cherry pick some to make one ship appear worse than the others, but it all boils down to which features you like and which you dislike.