Thanks - glad its helpful.
Just remember, the 10-22 fits just as well as the 8-16 under the 15-85...you'll still have 10-15, just as always, but you'll have another option for a different type of outing with a one lens choice.
That said, you are planning on keeping your FF where my decision is an either or. If I had both, Id consider the 24-105 due to its versatility on both bodies. It is a fine mid-range zoom on crop and even better on FF.
As long as you have options to hit every focal length on at least one of your cameras, you cant go wrong with either choice, really. My opinion is a little biased because I only used the 24-105 on crop and had no other option except to switch to the 10-22.
10-22 on your crop plus 24-105 on your FF at the same time would be a great combo.

Let's just all get over the whole 24-70 vs 24-105 debate and admit that both lenses have their own use and are very capable lenses.

