Is the Alpine CM5901 any better than the CM5908?

[Dan in NZ]

I'm trying to get a cd player in my car, but I would like to keep a factory head unit. I have the CM5908 Infrared-slot radio at the moment, which is impossible to get a cd changer for. I can get the CM5901 (Alpine, Alpine 2, Alpine 3) for $10-$20, and it's much easier to find changers for these as they can work with the CDX-M30. Would there be any noticable difference in sound quality just by changing the head unit?