I am in the process in paying off a 1100 for my oldest son and converting my kids four youth shotguns to adult size, barrels and stocks, otherwise I would have a 10 gauge or 12 gauge 3 1/2" on the way. It comes down to this. The 12 is alot cheaper than the 10. The 12 is lighter than the 10. Ballistically the 12 and 10 are close, same amount of shot, same velocity, but the 10 gauge throws better fuller patterns. This is due to the wider shell case. The 12 gauge 3 1/2" has longer shot strings. This is not a problem for shooting turkeys or deer with buckshot, both are stationay targets. Where the 10 shines is wingshooting, ducks and geese. If you are not a dedicated duck hunter you do not need a 10 gauge. But if you are a nut like me who is a insane, jealous person, who hates SP-10 even though I never met SP-10 simply because he has a SP-10 and I don't, well you get the idea. MIKE.
PS: SP-10 have you shot any 10 slugs yet? Waiting for a range report. MIKE.