I know Nut'n'fancy is sometimes out of favor but his experiance echos most of what I have heard. The Tacsol uses a steel slide and kinda wimpy plastics on their mags. This leads to FTF and FTE issues.

http://www.youtube.com/watch?v=rXoOA7Mdd3g

Now this is not my own experience as I have none with either kits and both are unobtanium right now anyways. But, just some food for thought. Advantage Arms uses an aluminum slide and a tougher mag.