It's difficult to improve on a classic, but the most visible change is the anodizing on all aluminum parts, which ensures a longer-lasting finish to the vise.
A 7" stem on the base adds more comfort for the tyer, a larger base adds more balance and a polyurethane O-ring on the jaws adds longer wear to your tying experience.
For hooks #28 to 4/0. For right handed fly tyers.