139 or 144 IBEX-ONE

Yea so this is some stupied bulliton that I just need a stright answer too, but I'm rideing Danny's Board (The One) and it is a Size 142 BIG Board I dunno.. So I want to get the Ibex but it only comes in a 139 or 138 or 144. Know I think the 144 is a big board $hi* its bigger then my board now, So my question is will it make a big difference going to a smaller board from a bigger board like what kind of affects will it have changeing sizes, and do you all think a 144 wakeboard is a big board, hard to spin what not...?