Sperzels are machined much more tightly than Schallers and others because anodizing the color onto aluminum is much thinner than the plating used on other tuning machines, which can be of a varying thickness so the parts on plated tuners need to have some "play" in them to allow different plating thicknesses to mate with each other.
Sperzels do feel a little smoother to me, and the lower gear ratio hasn't ever bugged me. If you've used Sperzels before, I'd say stick with them; no sense fixing what ain't borked.
FWIW, I have Sperzels on my ESP and Schallers on my Warmoth; both work absolutely fine, although the locking thumbscrews on the Schallers are a little easier to grip and the Sperzels feel a lot smoother in operation.
Sperzels do feel a little smoother to me, and the lower gear ratio hasn't ever bugged me. If you've used Sperzels before, I'd say stick with them; no sense fixing what ain't borked.
FWIW, I have Sperzels on my ESP and Schallers on my Warmoth; both work absolutely fine, although the locking thumbscrews on the Schallers are a little easier to grip and the Sperzels feel a lot smoother in operation.