I’ve made a script to configure and install it: HOWTO: Airspy mini and Airspy R2: Piaware / dump1090-fa configuration
Be aware with a Raspberry Pi the higher sample rate used in the comparison will not work due to lacking CPU resources and the difference to another dongle might not quite be as much.
It is still sampling at 12 MHz compared to the standard dongle which is sampling at 2.4 MHz.
I’m not sure how much the difference between 12 MHz sampling and 20 MHz sampling is, but navzptc wrote the performance was pretty much the same.
(retman describing his improvements above is using it with a Raspberry Pi running at 12 MHz)