Jeffrey, yes Sir. Most manufacturers including H&K make firearm packages that have 10rd magazines so their pistols can also be sold in state that have magazine capacity restrictions. The pistols are exactly the same but just have 10rd mags included. The pistols will also accept any standard capacity magazines just fine.

Yes, the gun is the exact same for either capacity, the 10 round magazine is the same size as well it just has a block preventing one from loading more than 10 rounds.