Hi Darren, I have surfed both lots. The JP was and still is my favorite. I had the 10'8, graduated to the 10'2 and now surf the 9'8 (which is a big step down)
I have the 11'4 Nalu and was demoing the 10'6 but really the JP and the Nalu are different. i think you will find the JP more versatile, the nalu is a longboard, fun but when it gets bigger you will appreciate the 10'2, the JP turns like a short board, whereas you have to turn the Nalu as a long board i found they dont like a rail turn.
But if point breaks and nose riding is you thing then the Nalu might be better

Enjoy
Greg