We have stayed at both properties and are quite familiar with them. I'm a little suprised everyone is recommending SR over DSV. We have taken my elderly mother-in-law twice to DSV II and here's why we think it's better for the elderly.
1) If you request the proper buildings, you can have a really fabulous view from your room and get much enjoyment from the vacation without even leaving your unit.
2)Requesting a room close to the pool area also helps.
3) The units at DSV II are larger than at SR, so more spacious inside (1450 sq. feet versus 1200) for the 2 bedroom.
The desert scenery at SR is very pretty and a nice contrast to Kentucky, so they might enjoy that. Personally, since we live in the desert 2 hours from Palm Springs, we enjoy the greener landscaping of DSV II.
I also know the right person to talk to at DSV about room requests, and we get a spectacular view every time. I am taking a day trip to SR in two days and am going to seek out the "right" person to talk to at this resort also about room requests. If you would like to know any of this information please send me a PM and I will share it with you.