Welcome to the forum John.
I have very little seat time in the 1100 but from what I've heard from owners is that the larger engine in the 1100 more than covers the extra weight, A/C... Basically, they say it does have more power to the tires than the 900. So, I'd say it'll perform at least as good as the 900.
OK, that said, you didn't mention the conditions on your property. The 1100 is about 500 pounds heavier. I don'thave any numbers or otherwise to back it up but suspect/guess it's a little more top heavy.
For me, if the 1100 and 900 were at the store and it was one or the other, I'd go with the 1100. The cab, heat, A/C... would come in awfully handy where I live.