The challenge is different: you've got way more units to control in SC2 than in Dota. And rushes can be punitive, which do not occur as frequently in Dota
The more units thing is part of the reason I think Dota is a better challenge, I can't help but feel a SC2 AI could use inhuman micro as a crutch whereas in Dota mechanical / micro skill doesn't provide quite as big an advantage.
Not too sure what you mean by 'rushes can be punitive' but Dota certainly has a variety of early game aggression strats which tend to be high risk / reward and are seen fairly regularly.
Not too sure what you mean by 'rushes can be punitive' but Dota certainly has a variety of early game aggression strats which tend to be high risk / reward and are seen fairly regularly.