I've seenand tried both Eric's TruGrip and SVI Scott. The TruGrip was on a Glock though, and the SVI Scott on, well....an SVI
I would never go for Scott grip. The ones I handled started losing grit while handling them
I would say, if you have an SVI/STI/SPS, smooth the grip (fill up the checkering with epoxy or grind it down to a smooth grip) and get some TruGrip. It will take a little work to get the grip smooth for the TruGrip to adhese, but it's way better than buying an expensive grip and having to throw it away after all the grit is gone