I have the pun jibs but I bought them at the end of last season so I didn't spend a lot of time on them. But from the time I did spend on them here's what I've gathered:
Nice and poppy
Super fun riding switch
Solid on jumps
I haven't hit any rails on them yet so I can't comment on that
But I did just win a pair of the 2013 Jib TW and they have noticeably thicker edges. My guess is that the pun jib had issues with edge cracking so they thickened up the edges for this year.