I've been a fan of HQPlayer with Roon, though only using it for PCM upsampling using the 'poly-sinc-long-lp' filter mostly.
reg1919 posts02-19-2021 11:06amA resounding no.
HQPlayer sounds way better than Roon.
After updating to Roon 1.8 I'm finding Roon's SQ to be better than I recall - a bit different to HQP, I may prefer it. I definitely like the snappier response to play/skipping tracks etc.
Roon SQ has leapfrogged Audirvana IMO also.
Been listening the last few days without HQPlayer and finding I don't miss it.
FWIW, I'm running Roon on an M1 Mac Mini with 16GB of ram.