A few years back, the P229 had a better/stronger slide than the P226 due to manufacturing differences.If you will remember, the USN had problems with corrosion with thier first P226's due to the way it was produced. Modern P226's and P229's use the same manufacturing materials/methods on thier slides so the issue is moot. I have a P226RST Crimson Trace in .357/.40 and I absolutely love it....though, the P229 is more practical because its smaller and more concealable. The beauty of the P229 is that its small enough to be concealed but large enough to maintain effective capacity and be shot effectively.I have always wanted a P226, but I would be much better served with a P229 as I am a CCW holder. I did carry my P226 this winter in my 5.11 parka, and it was perfectly concealed/comfortable. I decided that I wanted to get a P229RST to match my P226 but decided to get a SP2022 instead. The Sig Pro is lighter and more comfortable due to its adjustible grips and more accesible controls. I had the SP and P229 side by side and the SP hands down felt better to me and thus I bought it, added CTC Lasergrips and it has become my primary carry weapon. I carry my SP in .357 Sig with 125grn Gold Dots and couldn't be happier.
Lots of agencies use both the P226 and P229 as they are some of the finest weapons availible.The P229 makes more sense if you intend to carry concealed...Don't buy a P229 without first looking at the SP2022 as you may find you like it more, just like I did. Don't be a snob, the SP is in service with militaries the world over, including our own Army. It also earned Sig's largest contract to date. Its every bit the equal of the P229, except that its cheaper and better IMO.