The acr is sapphire blue and the non acr is red, both silver stripe. The red gts has had 5 owners over its 24000 mile life and the acr has had 2, one being the owner of a dealership. I'm buying the car because i've always wanted a gen2 gts. I plan on driving it once and awhile, maybe some shows and vca trips. Not sure if i'd take it to the track.
In the Viper World, the exterior color tends to distinguish the overall worth of the car. Not trying to start any wars here, but a Sapphire Blue GTS will always be more high in demand than a red GTS considering how many red Vipers have been built vs how many Sapphire Blue have been built. Once again, nothing wrong with red, just stating the obvious. The fact that it's a Sapphire Blue ACR is a no brainer. Especially since it's only had 2 owners, vs 5 owners on the Red GTS. It also has less miles. I'm surprised you had to ask others for advice haha, seems like a very easy decision! As long as you don't mind spending $10,000 more, go with the Blue Sapphire GTS. I would in a heart beat, since I was actually considering one myself before I bought my 96 B&W, I just couldn't swing the higher cost for it 3 years ago. In the end though, I'm extremely happy with my decision since I prefer the 96 B&W over any other Viper. To each his own.
So yes, to answer your original question the Sapphire Blue GTS/ACR is worth the extra cash for the lower miles. It is more collectible, and it is more desirable. However, if you are a fan of red, than it won't be more desirable of course.