Based on the professioanl games I watched, what I learned is: Chinese Dota is very methodical, very goal oriented. Chinese dota is the one where I expect less individual "big plays" but where I rarely see big throws.

South Korea dota is still too young, unexperienced. It's kinda of cute in a way, and where you can see some unexpected things because they'll try crazy stuff the more experienced teams may avoid.

Russian dota is super agressive. Big dives, big plays and big throws all around. Never a dull moment. DAVAI!