I've had both the phawt and the love seat (same as the couch but only 9" at the widest point). Aside from the WB difference the phawt has a lot less flat on the tail and is also rounder (like a traditional popsicle) on that end. Also, the taper on both is a little different, with the phawt being wider towards the back and the loveseat/couch being wider towards the center/front.
Both are great, functional shapes. Since I mostly skate flatground and curbs, I've kind of come to love the loveseat more but would def rock the phawt if I were more of a transition skater. That might also be because I'm pretty tall, but even so the loveseat doesn't feel short or anything.