+1 on the lazy river, but it really depends what kind of vacation experience you want. As mentioned, the Stellaris is a FS Marriott and as a Plat you're likely to get a room upgrade if you request nicely ahead of time and at check in. The Surf Club is timeshare and it sounds like at 280k that is a 2 bedroom villa?

If you only have a couple people, the 2bd villa isn't worth it since you won't be using the other room. You'd only need the upgrade to a 1bd villa. Having the kitchen and fridge is nice if you want to go to the store and get things for breakfast or lunch etc, but if you're planning on eating meals out all week then you won't get use out of it and the Stellaris may be a better fit.