Im looking at getting the sl or the legacy,...
Im looking at getting the sl or the legacy, how much wider is the legacy than the sl, im 5'8'' 165 to 170, with a size 10,
You really can't go wrong with either. I have the SL wear an 8.5 so I don't have to worry about toe hang. Not sure on the exact specs of the width. try contacting a gear head directly, they've got all the answers!
With a size 10 there's no reason to get the Legacy, the regular SL will be fine. I wear a 10.5 on my SL and I've got tons of room to spare.