Well I've had the same antenna setup for years (same antenna, wires, boosters etc) and I've had a Samsung ts 160, H20-600, HR20, and AM21 all hooked up to this same setup and among these four the HR20 is the worse with the H20 being easily the best. There are some channels that I get that are marginal which has given me the ability to truly see which boxes perform best. Right now I have the HR20 and AM21 which make for easy comparisons and there are some channels that I can almost always receive with the AM21 but lots of times can't get with HR20. There was a channel that I was only ever able to get with the H20.
Note that the H20-600 I had was better than the H20-100. The 600 had a later generation tuner than the 100. But the 600 ran hotter than the 100.