I have Speedcross 2s. I have another pair of Salomons (can't remember which one) in a size 11.5 and found them too small, fine for wandering around town but I went on a walk with them and my feet really hurt as they were too small.
I bought my Speedcross 2s in a 12.5 for a really good price. Did 10 miles in them on Saturday and found them comfy and big enough to wiggle my toes
I'm normally a size 11