Because the WT is custom built, it won't split or delaminate like boards from a mold. I prefer the better construction of custom boards.
You don't need 2 boards. I'm 83 kg and ride the 147 WT with my 9.3, 12, and 16 Rhino. That's all you need. It has good range. The fast planing shape and good speed give it good low end. I think it holds as good as any wakeboard I've ridden. But I have noticed Martin Vari uses bigger fins on his WT. You can see them in the Cabarete contest photos.