The game might have felt a bit close but it was not as much. Although both Chinas lost quite some buildings they were never in serious trouble in early and mid game. Choice of migs ended this game very fast in the end.
I had the feeling that USA played much too agressive wasting too many units. You can see that both Chinas got 3rd level genpoint promotrion before the other team did. That made quite a difference.
Still this was very well played, and if Chinas did not pay attention game could have been lost very fast. The 2nd game you posted was better overall in nearly all aspects.
Ye well because the other game was mirror so more balanced. But I think they've done most things right. they doubled everytime a different china, so It was a good team work between them. Everyone knows how hard is to have gu vs cc as a very good game, usually it ends in a bash.