having stayed at both i would return to the bc in a heart beat. wl is nice but i didnt care for the decor of the rooms. (i'm a girly girl and like softer colors) the lobby is very nice, but how much time do you really spend in the lobby?the transportion is iffy, as you share with fw. the bus to the mk is a great plus less then 5 minutes away.some like to take the boat to the mk but it is slow, and you can share with fw.
the bc is great, much prettier room decor and a little larger too. the dining options are great because you are close to 5 resorts in the epcot area. the walk to epcot is about 5 minutes and the walk to mgm is about 15-20. so right there you have 2 less buses to wait for. and if you are tired, there is a boat ride offered at both parks to and from bc. now the bus ride to mk from bc is the long, and there is bus sharing with the yc, but its right next door (not like the aggravating back tracking wl to fw) some have said you can share with bwi and s/d but we went in this past jan and never did. and being right on the bw there is just more to see and do at wl we felt so isolated.
so i do like the wl but i LOVE the bc.
have a great trip!