OP, i noticed NA are really really REALLY bad at attacking on both split and ascent.
While EMEA teams are decent to good on both sides.
You can see it more, internationally. It's actually crazy the amount of times an NA team starts 9-3 or more on ascent or split ct side and then end up losing the game. they can max get 4 rounds on attack it's so weird.
So no, EMEA are just good at both sides. in EMEA ascent is only slightly ct sided and if a team is really especially good at attacking then it's like a 7-5 either ct or t side.