Never ridden a Soul, or any Cotic, so can't offer a balanced view. However, they do look very attractive.
I'm on my second P7, the latter one looking very like the initial pic on page 1 of this thread.
I must admit to not giving a hoot about weight.
It's designed to deal with the kind of riding I'll ever want to do, even with my technical know-not-how, and it looks the effin' business.
If it weren't for that damn Hope II hub on the rear, it'd be STEALTH bike, and I'd be Ninja supreme!
Hope you make the right choice
happy trails