I'm always sorry to see people base their decision on getting 12 extra years 35 years from now. When you figure the time value of money, these years are virtually worthless.
If all of the resorts are truly equal to you, then go ahead and get the one that has the extra years. But if you will get any enjoyment at all by being withing walking distance to the parks, for example, then don't worry about the extra years because they are virtually worthless.
If you put $100 per year in an IRA for 35 years at 9 percent, that investment will grow to more than $23,000. If you calculate the stock market's historic return of 12 percent, then it will grow to more than $50,000. I know about inflation, but this far exceeds inflation.
So is owning at a resort that you really like worth $100 per year? At BWV you can easily save three or four times that by being able to get standard view rooms. Same goes for Old Key West and the Grand Villas. Just something to think about.