EarlDragonyou arrive half a second earlier than with kaidus' rollout if you do it right so you can prevent the enemy demo from getting the health or spamming to you and your roamer should arrive when you do so he can protect you.
Except when performing the kaidus rollout, you land DIRECTLY on the health pack if done right. I seriously doubt your rollout is faster considering you still have to walk to get the health pack.
And kaidus' rollout is just so much more fun