When you pull the centaurs, they stun when they are moving back to their camp, in dota1, they only stun when they are chasing you.
When the creeps gets stunned in lane by the centaur, they chase the centaur when the stun expires, in dota 1, only the range creep chase the centaurs.

It also looks like the respawn block area is smaller in dota 2(makes it easier to doublespawn)