I currently have both the AEM (mine) and Innovate (borrowed from a friend for datalogging) gauges in my car. The AEM seems to be more sensitive and jumps around quite a bit. The Innovate seems a bit more stable. I actually like it a little better for this reason. Both have new sensors and read the same so no difference there. Amazon has both kits for about ~$160 and IMO you can't go wrong with either. Just thought I'd share since I've never seen anyone with one of each gauge working in a car at the same time.