Yeah that was me that asked. I emailed LEIGH and got a pretty prompt reply.
DVD rather than VHS instructional video One piece extrusion rather than two. Three router bits rather than two Roughed up clamping surfaces
I don't remember seeing anything about the side adjustments but I would believe it.
All in all I decided I would rather go buy one that day than wait for one to get shipped to me for 60 more. I don't regret that choice.
I have figured the jig out in basically a couple days, using it to make through and sliding dovetails thus far. I am very impressed with the through dovetail aspect, though I think my router table works better for sliding dovetails.
Actually the test joint I made first is for a 23" deep chest of drawers, and it worked perfectly first try
Andrew