Hello,
We have stayed at the both resorts. We have stayed lots of times in Grande Villas (every year almost since 2008) and decided to give the Blue Tree a try last year. The 2 bedroomed units are smaller but just as nice as GV, they don't have a washing machine/dryer but they have laundry rooms with large brand new machines in them and they were cheap enough to use (3$ To wash and around $5 all in to dry as well). The main differences are little things really......we found the pools really nice and I think there might be more of them. Walking past BT, I never realised how big it was, it's deceiving from the outside entrance......the wifi is free too and finally the front desk seem a bit nicer!!
With the introduction of a daily resort fee (brand new for 2014) payable on check out at Grande Viillas ($6.75 per day) I think we are gonna convert to Blue Tree permanently!!'
Oh....I asked the kids which they preferred and they said they like both resorts. BT run a similar kids programme to GV.
Hope this helps.
Mandy