Depends. If they share platforms. I have a couple problems with GM.
1) They don't care about cars only trucks
2) They still use 1950's push rod engines
3) Horrible gas mileage
4) Not cool looking, always bland. They should rename Chevy the car of the witness protection program
5)Not safe
If they can fix these things they just might go back to them. But not likely, though. I've seen whats coming down the pipe at Toyota and Honda and it pretty much blows Detroit away.
Cavalier/Cobalt or the new Civic -- no contest there Civic by a mile
Impala or Camry --- a I don't like cop cars Camry
Aveo or Fit - Fit please