I prefer the original model. It’s got a sub-2.5” blade and full grip. My reasoning is that I wanted something extremely quick to access, offered a solid grip and good retention and was difficult to foul the draw in a reactive close-quarter scenario and I think the TDI gives me that. I guess a bit similar to the concept of a snub revolver with full grips, which I also have an affinity for. They also just came out with an “investigator” model, which is smaller and lighter overall, but the grip is shorter and the blade is longer which going the wrong way for my use.