I guess we'll eventually see just how good Milos is if he signs with an NBA team this summer. I don't think he's meant to be a replacement for George Hill, I see him more as a combo-guard backup. I think that's the way the Jazz see it too. Though from everything David Locke has been saying it certainly looks like the Jazz will try and replace Hill before July 1st, hopefully with one of: Ricky Rubio, Goran Dragic, Eric Bledsoe, Damian Lillard, or Matthew Dellavedova.
As far as a comparable foreign player - I think Milos is a rich man's Jose Calderon. Calderon wasn't a defensive phenom, but he was never in the wrong place, and made all his free throws, hit his opens 3 pointers, and made the right pass at the right time. Milos just does it with style.
At any rate, I'd hate to see Milos murder us while wearing a Spurs jersey. That would be heart breaking. Especially knowing that Quin Snyder had been his coach before, and they had an amicable relationship - it seems like we could have an edge FOR ONCE in getting a sought after free agent.