i think it takes skill to play both. tourney you can lean on someone withyour stack, cash you cant, as they can just rebuy, unless you know they have nothing behind it then you can lean on them. but cash you can also make calls for all your chips on a flush draw and other hands, and it cost you a rebuy, but a tourney might be at stake if you call with a flush draw. You have to know these aspects going in, or it can present problems for you.