The 226 is one of the full size sidearms of the p-series lineup the 210 and 220 are the other two. Barrel length is 4.4 inches. Trigger guard is dished. The 226 was originally a 9mm, but sig has expanded it to accomodate the .40S&W, and .357SIG. The 9mm was originally intended to utilize a 15 round, double column magazine, but now use a 10 round a PC 10 rounder. The .40 and .357 sig also use a 10 round double column magazine. Finishes are blued, two-tone, or "K-Kote" which is supposed to be a more durable finish.
The 228 is a 9mm only compact weapon that has earned the M-11 contract with the armed forces. Trigger guard is rounded, and the barrel length is 3.9 inches. The 228 originally had a 13 round mgazine, but now is sold to us civi's with 10 rounders only. Finish availability is the same as the 226.
Both weapons are very good and are considered to be at the high end of the pistol market. I own a 226 in two-tone 9mm...I love it, best pistol I have ever owned.
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"By His stripes we are healed..."
PeterGunn