If I had to choose with no financial or other implications, I'll take Ronnie Brown. The risk that Ricky won't pan out is equal to or greater than the risk that Ronnie won't pan out.
Given the contract and draft pick we have to use on Ronnie, I have to take Wililams. We don't necessarily even have to draft somebody to back him up -- I don't trust Gordon much, but I'm willing to trust him that far. If he doesn't pan out or if Ricky doesn't, there should be a nice crop of unrestricted free agents next year.