The JP SLW starts planing a tidy bit earlier and behaves more like a mini formula. It points higher but will also start pulling at your ankles (a bit like formula) when overpowered.
If you 're looking for more speed and maneuvrability, say the slalom feeling, then the US147 is the board to choose. With the US147, you will not quickly be overpowered.
IS87 / IS101 / IS122 / US147