So random update: I swapped my older TRP Spyres for some TRP HY/RDs. Only changed calipers - the rotors and cable housings stayed.
What I expected was that there would be less friction/resistance in pulling the hydro lever on the HY/RDs than the mechanical lever on the Spyres. I was right. They feel really nice and they give me quite a bit more control when trying to modulate the brakes over technical riding.
These are being paired w. the Sensah SRX Pro levers and they work very well.