They are very similar with similar amenities. They are by the same builder.
Windsor Palms is fully built and is smaller than Windsor Hills. IMHO you can walk easily to the clubhouse from all homes at WP, not necessarily as easy in WH.
They are both close to WDW, the difference in drive times is a couple of minutes!
Someone mentioned about newer homes. I know a few owners and it is not the age of the home that is the issue, but make sure that the home is maintained well.
Find a home you like - that is IMHO the most important thing!
-Kay