The finish has gone from two roughly applied coats to four precisely applied ones - that's been one of those learning processes of how to make it look really good. The visual difference between first generation and current cabs in the acrylic coating alone is vast, despite it being the same product that we're applying.
The badge on the cab you saw would still have had its protective plastic covering, so you wouldn't have seen the nice anodised aluminium finish. The plywood is different. The cab construction is completely different, with them now cut on a CNC machine and assembled in our micro-factory rather than cut and built with hand tools. The radius on the edges is larger which looks better and is more damage resistant.
On the hardware front, the woofer and handle bolts are different, the corners are different, the corner and speakon screws are different and there are two speakons on 8 ohm models. There are feet on all the cabs. The grill and mounting method is different. However you're correct that the handles haven't changed - because we've yet to find a better one!
We believe that all the differences between old and new represent improvements on both aesthetic and functional fronts and add up to a much better looking product - back in the day we used to get a lot of "it sounds great despite not looking brilliant" but in recent times it's overwhelmingly "it looks and sounds amazing!" Look at the feedback on our site to hear it from the customers' mouths. If there's more we can improve though, I'd like to do so.