I'm probably not the best salesman on this. I just don't get excited by hardtops just to oooh and ahhh over them. I look at a hardtop and go "hmm, there's something to keep the wet and cold off me and it's quieter than a soft top".
Haven't sold any of the Keystone tops since they parted brands, but it's still the same as the Bestop when it was under that brand. Quality was as good as factory.
The Smitty was surprisingly nice. I have a little concern with the design as far as whether water would pool on the flattop roof surface (Keystone is ridged) and degrade it over the long term, but that difference in design is what would make this likely the slightly quieter top. Viewing area is pretty much the same as on the Keystone.
Keep in mind, I'm not doing a side-by-side comparison. Just observations from seeing them at two different points in time.