Really there is not much difference between Mir Hussein Mousavi and Ahmadinejad when it comes to economy! both are for redistributing wealth and both have or had followed policies that encouraged and inspired rent seeking behavior in Iran. On another hand if we believe Mr. Mousavi would continue political reforms, we must ask how he plans to make them sustainable by ignoring expanding private sector and free markets?
There is a possibility that Mr. Karroubi would advocate some sound economic strategy, however that won't be very popular at the moment. Is it possible that economy continues on this path indifferent from who is the president?