JC's done a comparison video here of old and new modelling:
The Agoura EVH model definitely sounds like there's more poweramp distortion, it's much more midrangy and bloated/thick. It's the ugly sounding distortion Im hearing in other clips. IMO the older model sounds nicer.
On the lower gain models, the onset of gain sounds a lot more dynamic and I think it sounds very pleasing. I think it sounds noticeably better (for instance in his opening clips, or on the AC30). US Luxe absolutely sounds more dynamic, by comparison the old model sounds like it has a pedal in front that won't quite allow things to clean up as much. AC30 I was sort of split on, overall I think Agoura sounds better but the old model had a few tones I liked more.