Have never really payed attention to the p228. From just a quick look at the photos, it seems a lot like my p239 SAS Gen. 2, m/b smaller. All my SIG's seem sturdy enough to use as hammers. And, they are great to shoot.
The P228 is a chopped down version of the P226. It can be configured to run 17+1 with an ex-grip adapter and 17 round P226 mags. It is larger than the P239 but higher capacity. It also balances better in my hands. It is one of the best guns ever made IMHO.