I've stayed at the Seaworld Residence Inn, and I've done a time-share tour at Cypress Harbour.
Cypress Harbour is completely made up of 2-bedroom condos. As you walk in the door, there's a kitchen and a laundry room on one side. Straight ahead is a dining room table and a living room with a view towards the lake. The master bedroom has a king-sized bed and a large tub. The guest room has a queen and its own bath. You'll have two balconies -- one screened, the other open air. 3 TVs and VCR/DVD players. Pool is okay. At Cypress Harbor you won't have daily maid service (unless you pay extra).
Residence Inn has studios, 1-bedrooms, and 2-bedrooms. If you're looking at at two-bedroom, the size will be approximately the same as Cypress Harbour, and you'll have the same two baths. 3 TVs, but no DVD/VCRs. No balconies. The kitchen is smaller: full-sized fridge, microwave, 2-burner stove, dishwasher, no oven. You won't have the laundry room (though there is one near the lobby). One big plus is that the Residence Inn provides a free breakfast bar each morning, and it's a good one: eggs, sausage, waffles, fresh fruit, and more . . . the menu changes a bit each morning. Residence Inn has a Pizza Hut by the pool, but no other on-site restaurants. The pool is nice, but not all that big. It's empty mid-day while everyone's at the parks.