Just wanted to ask, is the only difference between the P228 Sig and the P229 is the way they are built? I have read that the P228 has a stamped out slide, and the P229 has a slide made out of bar stock steel or something along those lines, so it can handle bigger calibers then 9mm. I just wanted to know if that is the only true difference and everything else about the two guns are the same. Reason I am curious is because, I am wanting to pick up a P228, but might have to settle for a Sig P229, being I am having trouble finding a P228.