Purely economical decision: BLT is a much better value. Like not even close to comparable. Cheaper per point, cheaper dues, longer contract. as far as on property resorts go, BLT is one of the best values, BCV probably the worst.
Since you can not decide between the 2 (or at least are asking for others to chime in) - I feel that economics alone are the reason to buy BLT.
All that being said, BLT and CR for that matter, goes along with YC as the only Disney resorts at which I have yet to stay as they offer no appeal. Beach Club wins here hands down.
Do you have kids? BLT is great if you go to MK a lot a you can walk it easily.
Being on the duct tape monorails may actually be a negative.
I have had success switching out to BCV for Dapper Day (and flower and garden) the past few years, but if you want to stay at BCV with any reliability, you have to buy there. If you are thinking food and wine, there basically is no choice.
BLT
+better value
+walk to MK
+views
-pools
BCV
+Walk to Epcot, walk over to Boardwalk at night
+SAB
-no real views from the villas
-very expensive