Hindus believe in the existence of a soul and god. Buddhists say the soul is non-existent and there’s no god to connect to.

Hindus meditate so that their soul becomes closer and closer to the ultimate reality, which is everything. Their soul hopefluly eventually becomes one with the ultimate reality, which could be labelled as god, though god is label-less. This is a bit like sufism which brings the soul nearer and nearer to the only reality of god.

Buddhists reject the notion of soul, saying all things are non-self and are impermanent. During meditation they liberating themselves from all notions of “I” and attachment to anything since there is nothing to attach. Buddhists see an ultimate reality that isn’t god and don’t become one with it because there’s nothing to attach to it.

There are many sects of hinduism and buddhism so their meditation techniques will share both similarties and differences depending on who’s compared.