No difference. Another vote for Talley lightweights on a hunting rifle. Another good choice are the DNZ mounts. Talley's are 2 piece, and I think look better. The DNZ's are 1 piece and I think might must be a bit stronger. Not because they are 1 piece, but they have more metal around the scope. In fact I've used them and cut the rail off in the middle to make loading/unloading easier with no rail over the ejection port.
Only 2 types of mounts I'll use anymore. If money is a concern anything with a slot that uses "Weaver" style rings works just fine too. I just don't think they look as good. I wouldn't touch anything with dovetails.