I own a Superconductor, but have never ridden a Kessler, so I can't give you the input you'd need to make an informed decision. Clearly the only thing to do is buy one of each
I am not a "one-board quiver" guy, but I have found that I'm less and less willing to interrupt a day of riding to switch boards, and my Superconductor has pretty much become my go-to board for anything other than soft snow / powder, replacing my Coiler Mini-Monster. A lot more reviews in a lot more detail (by much more perceptive / skilled riders) can be found in the Reviews section of the board, but I will say that it is lively, forgiving of technique errors and less-than-ideal conditions, and has edge hold as good as my metal boards. What's not to love?