Something similar to the bouillabaisse scene in Our Man Flint ??Without a side view and a back view, I can't see any appreciable difference.
Suggestion: Make a two-part You Tube video. In the first part, you're in a bar brawl wearing the 39R; in the second, the action has moved to the parking lot, but now you're wearing the 40R.
A 360-degree look at you in action--that's what I need to make the call.