less than an 1 inch difference between Nelson and Sneed when it comes to Arms, Nelson listed at 5' 11" and 194lbs, but I think the difference is that he's not an draft prospect. He's a veteran FA that has had success as a starting CB in the league, with some outlets consider him playing better than Sneed (4 int vs 2 int).
I don't expect us to sign him but a guy can hope, mostly I think he is a great example of a player that would be less than half the price of Sneed and arguably a better player.