I felt the major difference was that GH were well drilled and had established 'go-to' routines. For example, whenever one of their players was on the ball they barely needed to look up to know where 2-3 supporting options were to release the ball to. Similarly when we were in posession there was no hesitation in their ranks knowing who's job it was to press in that particular situation (and usually 2-3 of them). They created overload after overload. We weren't outclassed IMO but they had a roughly 0.5 second advantage every time.