Except for Satuli Canteen, and Ronto Wraps, (and maybe Friar's Nook since I love tots/fries with stuff on them,) Disney's QS places leave a LOT to be desired. (Epcot is the exception, with many fabulous choices , esp during festivals, ) Disney does have some excellent TS places, like Boma, Tusker House, etc, and haven't found anything comparable at Universal.
For typical QS, I don't think Univeral is any worse. We've definitely had some clunkers, and some really good food.
for IoA: almost always satisfied with Thunder Falls. That's DH's go-to
Green/Eggs and Ham is like Friar's Nook-tots with stuff on them, but yummy if you like that.
Three Broomsticks is good enough for the HP ambiance, but we haven't eaten there in many years, and it was for breakfast both times, really enjoyed the English breakfast platter.
Hogshead- great place to get butter beer, and beers if desired
Fire-eater's Grill in a pinch. the gyro was good, and the chicken nuggets, nothing special, but ok
Cafe 4 and Comic Strip Cafe-blech both times. Would skip
Burger Digs- DS like burgers for most of his meals, he said it's an ok theme park burger
Never been to Mythos, so no opinions.
Universal:
Today Cafe- my go-to, sandwiches are very good. Even DS likes the turkey and cheese there (takes off all the other toppings,)
Finnegans-good table service, not extraordinary, but we've always have a good, satisfying meal there, usually easy to get in, for some AC
Leaky Cauldron-another good enough place, if nothing else, for the HP ambiance. havent' eaten there though in many years.
Crepe Stand-FINALLY tried it, and it is VERY delicious. but very slow, quite a bit of a hassle, but yummy
When kids were very little, we'd do that Simpson's food court, but now we totally avoid that area. it's gets insanely crowded in there.
haven't been to Richter's in about 20 years, never to Lombards,
I HATE, loathe Disney pizza, so that pizza slice at Louie's, while nothing extra special, is way better than that, and huge, and good enough.
Citywalk:
We've enjoyed Cowfish several times. The only thing DH didn't like was the last trip,, the peanut butter burger, but overall that's our City walk go-to. I've always had yummy food.
Toothsome's is our other City Walk go-to, but personally, I've only had so-so food there, DH has had some good sandwiches. DS's burger was almost raw/inedible, so mixed bag, but definitely fun atmosphere.
Bread Box, is my go-to for QS on City Walk. We very often get that in the afternoon after leaving the parks, or if we're walking between the parks. They have similar sandwiches to Today Cafe, and a little cheaper.
DH often goes to BEnd the Bao-has had mixed experiences, and the wait for food after ordering is long, but overall, he's been happy w it
Bigfire and NBC Grill were both good enough, I think Bigfire was a bit overpriced and not worth it.
I hear great things about Strong Water Tavern, and Jake's American, for resort dining. Since DS is all about burgers, I want to try it from Jakes, maybe on our next trip.
and Voodoo Donuts is a must for us.
And adding Florian's Ice cream. Best theme park ice cream . France pavilion in Epcot , and Salt n Straw are close behind, but Florians is great!
Good luck with the trip planning!!! there's definitely some good food at Universal Orlando.