One difference is in yoga, one should not meditate while defecating, whereas in Buddhism, one should continue to medidate even if one has to defecate.
Meditation is one of a number of practices absorbed by Buddhism from Brahmism. There seems to be a different goal for the meditation.
1. Good Lord, that is SO India, yoga and Buddha!
2. Yes, so I read. But I do think that meditation was world wide. The American Indians mediated...with the help of their "funny" smoke.
I think many cultures' "wise" men and women did that...with help from funny fumes, wacky weeds and mystic mushrooms. Those were the tools of their trade.