I've done both the WBTA and EBPC and I think there were slightly more people on the EBPC. Probably because flights were cheaper (vs. one-way to Europe). But neither were very crowded, relatively speaking, as a previous poster stated, because while all the rooms are usually sold out, not all the beds are. It was great to do with my kids because they had so much less competition for the Mickey pool and the kids clubs. One of my favorite memories of the EBPC is sitting on deck watching my son playing in the Mickey pool while we went through the PC - there were only like 2 other kids in the pool, which is pretty rare for a normal
Disney Cruise, but not that unusual for a TA or PC.