The Ren is an earlier model of the 430 and has a different brand of hard drive. The very early model only have a 20 gig drive while the later model had 30 gig. The Rbz is from mid 2010 to present and has a more dependable manf. and hard drive. I just bought a used Ren for 142.00 plus shipping on ebay. Excellent shape out of a late 09 300. Your radio need to low speed bus. Was a drop in mod. Had dealer turn on camera feature and adding a back up camera from Steve White motors. Ren seems like they are cheaper then Rbz as everyone is looking for a Rbz. Hope this helps.