I have stayed at both several times, regular room and suite at HBC, suites at the Waldorf.
Once I booked at HBC and since I am a Hilton Honors member, I received an email with an offer to upgrade to various level rooms at the Waldorf if there was availability at check. I usually travel off season, not always. I really like both hotels a lot. The Waldorf feels very upscale, the HBC feels up to date and more trendy. They both opened in 2009. Staying at one gives you access to both pools. I thought the bus service was great, busses run ever 30 minutes like clockwork so you know exactly when to show up to take the bus and they were not crowded, maybe because there is some convention business at the hotels with meetings at the meeting complex that connects the two. I would say the Waldorf is more serene but both are lovely. There’s a great breakfast buffet at HBC. The Waldorf pool is like an oasis, but the lazy river at HBC is fun too. We had a car so drove to parks as well. There is a Target not too far that we like better than the
walmart on 535. If they still have it, the Waldorf has a complimentary coffee and tea service in the Peacock lounge in the am, featuring Tea Forte teas, my favorite. I think I have read these hotels still come up in Priceline. I have booked the HBC as a Priceline express deal. There are resort fees and parking fees but I found the rooms and amenities a cut above Disney deluxes.