Yes, this was also part of the discussion some months ago that the RTL-SDR can outperform the FA stick. I am still struglling with the search engine here.
I think it’s that one where i’ve read it:
Maximum message rate without mlat? - FlightAware / ADS-B Flight Tracking - FlightAware Discussions
And another one here:
Maximum message count rate? - FlightAware / ADS-B Flight Tracking - FlightAware Discussions