I would keep the Classics one, it's color is much more vintage toy accurate and although the RTS one is brighter, I wouldn't call it more accurate to the cartoon.
I own a Reprolabelled Classics Hotrod and a Henkei Hot Rodimus. Since the Henkei one looks more 'majestic' due to the chrome, I upgraded him with the Protector armor with the Side Arm chrome spoiler extensions.
http://www.youtube.com/watch?v=3zBqqpRkcbc