We've stayed at both & loved them both. If money were no object I'd stay at BWI, but for a saving of $1300, I'd definitely stay at POR & not look back.
I love the Deluxe resorts, I've stayed at all except AKL. IMO, the mods are just as nice, they just don't have some of the amenities that the deluxes do or location, obviously.
POR has a great themed pool & nice quiet pools. You can rent watercraft there also. I thought POR had great dining choices & the grounds were beautiful.
Like I said, if money was not a consideration I'd do BWI, but a savings of $1300 would definitely make me change to POR. (BTW - I'm a DVC owner so I love the deluxes too!)