The dramitic differnce between Uniglide and Suntour was the Uniglides had every 4th tooth or so offset to alloy better pickup shifting between gears. If you look at one close it actually looks like a lot of the teeth are bent on a Uniglide the better pickup mainly helped with early indexing and does very little for friction. While the ramps on a nice Hyperglide alloy the chain to slide more smoothley between gears while staying engaged to the cogs longer resulting in beter overall shifting.