That would depend on where you are looking. The far east would appear to offer more positions on Boeing 737 vs A320, though of course the A320 is present in good numbers too.
I suspect you are asking from a low houred perspective and forgive me if that is not the case.
I would advise that you refrain from getting any rating without the promise of a job at the end of it and certainly resist the temptation of buying into any pay to fly line training deals as they are the disease of this industry and should not be supported by anyone.