well .. both brands are great but i need a waterproof tab .. which perhaps not available in apple and Samsung . ..
Well you could have said that in the first place. It is usually Sony who makes these.
That's what I was just thinking. You should state this vital requirement in the op. Does it really need to be waterproof? Are there many tablets that are even waterproof? I'd just go with a cheap one. I just googled waterproof ones and they seem to be very expensive.