I like both, crimson will be grip activated, laserlyte thumb. Now I was not taught with the thumbs up, so I needed to revamp my training a bit so I can activate my laser with my thumb, kind of easy now, Both are good sights. I was old school and refused lasers, now I want one on everything, I can use iron or laser. Not had a problem with them at all and lasts pretty long.
You can see mine in the galley sucking up some exyreme shock ammo