What is better a Ninja ultralight reg or a Ninja pro reg

[resistence1993]

I'm planing to buy this
http://www.bzpaintball.co.uk/product.php?p=Fuel Supralite Air System with Ninja UL Reg&t=Air Systems

It can come with ether a ultra light Ninja reg or a pro reg the pro reg is a extra £10.

So what is better what are the weight differences etc whatever is worth knowing.

 

[Garideon]

Pro reg is the best. It can be rotated so the fill nipple isn't digging into your wrist