I think its hard to expect players that are used to playing chinese chars, to play with the high demand for cooperative play needed by the euro chars. Cooperative play doesnt just mean teamwork or gaming attitude :/ it is also reflected in your char build among other things.
For now Euro players on isro will not be as good as we expect, but I'm sure given enough time, players will be able to learn and adapt to Euro chars and play them properly.
So its kinda premature to speculate a comparison between the two char types at the moment

. If youve played on csro and ksro thats different. Maybe you could just share with us your experience of what it was like when you were playing there

.