they perform great.
i have not noticed any noticeable difference since swapping from my A10 to A20 mini for cast radios.
the A20 mini are handling the quiet and loud sounds from cast equally well. but without the necessity of changing gain on the tx to get good levels at the mixer, which makes my workflow, and that of my team sooooo much less stressful.
when testing, the noise floor sounded fairly similar between an A20 mini with 45dB of gain on an A10rx, and an A10 with 22dB of gain and 23db of gain at the mixer. my normal settings for A20 mini are 24-28dB and A10rx at 0, and A10 tx at 22dB with between 0 and +4 at the mixer.