PVB has sliding doors to both bathroom spaces. VGF also has sliding doors to both spaces...as well as a sliding door between both spaces.
Both rooms have the fold out murphy bed and the living areas felt to me about the same size.
So basically -- it comes down to theming, location, and resort amenities, as I would say the room layouts are more or less identical (see pics below).
Location --
I'm a VGF guy thru and thru - but I must say that PVB has the better location. You get picked up on the park buses prior to VGF, as well as the monorail -- so there is a lower likelihood of having to wait for another monorail or bus to go to the parks. The
DVC locations are also VERY close to the TTC (less than 5 min walk from moorea building), and the security there is very quick. From there, you can get to epcot via monorail -- MK via resort monorail, express monorail, or giant ferry. It literally took about 10 minutes to go from Epcot to my room at PVB this past week (once I was on the monorail).
With VGF, you have to take the resort monorail or ferry. To get to epcot, you either walk to TTC or ride resort monorail and do the interchange at TTC.
Theming --
Obviously, this is a personal preference decision. I LOVE the GF lobby. Could just sit there for hours in the evenings (and I have). I actually liked the decor of the poly rooms more than I thought I would -- but I'm NOT a huge fan of the theming of the lobby as much as GF. The grounds of both are beautiful. The PVB buildings do seem further away from the main lobby -- but I might be wrong about that.
Amenities
VGF has more upscale restaurants and princess themed happenings. The pool at POLY is better themed IMHO, but not so much so that I'd switch. The kid's splash area at POLY looks awesome, but I didn't go over there since my DD(4) decided she was too old to play in the kiddy area this trip. Ironically enough -- I chose poly over VGF for this past trip b/c (1) we hadn't stayed there before and (2) the kid's play area looked awesome.
Personally -- I would probably still lean towards VGF for future trips (rooms are brighter)...but I wouldn't be sad if PVB was my backup choice.
https://www.google.com/search?q=VGF...=989&safe=active&ssui=on#imgrc=ViZwnAZ5M6ASYM: