Been to both.
YCG is fine, but nothing spectacular or terribly memorable. Still, beats some of the other choices in the whole BW area.
WPC has a more interesting menu, and better selection. Prices are probably a little higher as well.
I'd have to say WPC, unless you are going to happen to be right there at YCG, in which case it would be fine. If you make me choose, I'm heading over to WPC.