Hi Hesham,
First, for more indepth, and more general G&L guitar info, check out the
GbL. The folks there know more about G&Ls than you would believe.
2nd, G&L does not offer any scalloped fretboards. As for the future, who knows? As for uniform width, I don't know what this means, so I can't comment.
And as BigBee said, the different pups give you a different sound. That is the only functional difference between the guitars. The rest is cosmetics.
Take care,
edg