Don't think so, Cavani as our lone striker would do wonders to our team, we all know he can bang goals and that would be his job here, he moves well without the ball, he'a athletic and he's a hard worker, good header and nice outside shot.
Also i see there are some doubts about his transition to our team and our system, Cavani strikes me as tough player mentally, one who won't give up ( Hello Amauri ).
Suarez is very good player, i rate him highly and i would love for us to sign him, like i said i had doubts if he could play as a lone striker, think he could play as a LW in place of Vucinic, don't know how his game will translate. He's very similar to the Aguero/Del piero kind of player, typical SS who could score and create at the same time but needs to play off someone else.