XBOX 1 differences?

[MeatLoaf]

Lads asked for an xbox 1 for xmas.

I notice theres a few different models. Hardware wise are they all the same spec? Are there any potential issues i should be looking out for on pre owned consoles?

 

[MeatLoaf]

Thanks for the replies. I wont be buying a new one. It will be used console i buy. He has a habit of being heavy handed so im not splashing out on a new one for him to break.

So, the original xbox 1, the chunky one... will it play minecroaft and roblox - the only things he really wants to play atm