Roamio basic Tuner PQ vs older models (OTA)

Hi -



I recently unplugged my Tivo HD from OTA (Amazon Basics antenna w/ amp), since I wanted to test the Tuner on the TV itself (new Samsung F8500 series), and I noticed that the PQ is much better, and CW channel doesn't pixelate anymore.



For people who have had the new Roamio lines (especially basic), how does the PQ compare to Premieres & Series 3 on OTA ?



Thanks,



Houman