I don't want to speak for Crimson but, my Kholster's are almost identical to the supertuck and yes you can tuck your shirt in over it. You can still see the black clips that clips over your belt but, unless you know what you're looking at, you'd never know anything was up. I like the double hook/clip holsters better because they seem to stay put better and they don't tilt on their own throughout the day. You can also adjust the cant to suit your needs by moving the clips up or down in the pre-punched holes (as you can see in the pic) on each side of the leather fwiw.
Have been looking at them since last night. The wife is getting a little pissed at the amount of money I have spent on safes(1 bedroom and 3 vehicle), Ammo cans, and Dummy rounds. Oh well 1 more item and I am done(For now 
). Believe I will go with the crossbreed Super Tuck. Seems like everyone who has one or similar(like yours) really likes them.
Thank you Sir. Helpful info.
Another little tip that might be helpful, when you first get the holster it may have the tendency to squeak a little where the back of the clips rubs on the leather. It will get better as you break it in but, if you want to do away with it completely, just buy some of those peel and stick velcro tabs. Take the soft fuzzy side and stick it on the back of the clips with the fuzzy side facing the leather and it cuts out all the noise completely. I've had it on both of mine for over a year and it hasn't moved or made a sound since. Some people say to put baby powder en sech on it til you break it in but the fuzzy velcro trick last waaaay longer.
I haven't noticed it (my Kholster) scuffing my trigger guard so I'm not real sure. I do have traction grips on my Shield and put a small piece on the front of the trigger guard for added grip with my pointer finger, that could be protecting mine. Having said that, the traction grip piece doesn't have any wear on it either and I've been carrying it for over a year now.
