The 1 on the left is the current incarnation of the Swiss 6497/2 offered on some models. The same movement, as far as I can tell, as the previous version but with 1 major improvement - the bridge plate finishing is as good as gen!! The 1 on the right is the current FrankenSwiss 6497/2 that The Zigmeister did his review on.
So my question to the movement experts is this: can the balance & regulator assembly of the 1 on the right, be married to the very nice movement on the left, resulting in a 6497/2 that would be as close to gen as you can get - would even fool most of the so-called experts, me thinks.