From what I can tell, the premium lows have:
- scallop/chevron stitch on the side
- more padding in the tongue and side panels (anterior to the chevron)
- tongue is slightly wider but about the same length as OG achilles
- heel tab rises higher while ankle region (below your malleolus) actually sits lower vs OG
- different lining layout: smooth leather covers heel collar rather than breaking into a suede patch (heel is still suede however)
- toebox is a smoother almond...