I agree with Jack. They are better from a functional perspective. I tend to strangle the neck when playing open chords and always have worn spots at the 1st fret where the B and G strings are. Stainless gets rid of that, well, it is going to take a lot longer. I like them much better for that reason. I forget that the frets are stainless and can't really tell the difference. They allow for bends a bit easier, but the strings last just as well. They are a bit harder to work on, and require a bit more patience to do a leveling job on, but I'll pay for that. It isn't that big of an issue. My neck didn't need the frets to be leveled anyhow. The rest of the tonal stuff is garbage. If it were true, the gold frets would sound different as well, as well as anything with a brass nut, or more durable tuners with different alloys that the pegs and gears, you see how this is going nowhere... The one thing that would make me buy nickle brass frets is if I wanted binding on a neck. Other than that I am going with Stainless for everything.
Patrick