Premier also modified the focus system on the 20-50s to increase the breadth of focus. If you have a 20-50 with the standard Leupold focus mechanism set to top out at ~58 yards it will only come down to 19-20 yards without a close focus adapter rather than the 14-15 of the premier version. I know this because I've got one! That's not to say that this new scope has the same system.
The folks who've looked at it say it's a non-starter.....I guess they've fiddled about with the front end to see just what can be done.