Tevez is a tricky situation
1) he's considerably older then Jovetic, and a bit older then Higuain.
2) He isnt the player from 3 years ago that tore the epl apart
3) However, in this lesser form, he's still considerably better then Jovetic, but one doesnt know what potential Jovetic has, and how fast he'll get there.
4) Higuain is a better addition.
Thing is, apart from Higuain's superior scoring ability, for the next 2/3 years, he's vastly superior in every other quality, compared to all the other player we could realistically get.
Realistically in, not Suarez. Suarez > Tevez. Hence, given a good team, Suarez could become > Tevez from a few years ago.
Only take him, if we can get a significantly better deal then Jovetic, wich i doubt