So far I have used Vortex, Varmilo/Leopold and KType PBTs (probably Tai-Hoa) caps.
Varmilo are by far the best. Dunno what it is excactly, but I just love them. The font is timeless and they have a nice texture, sound and feel. I wish they would make double shots.
My Vortex are laser engraved. They are fine for their price, less/ no texture, very smooth, use them at work, pretty loud, but so far noone comlained.
KType caps are well, somethere in the middle, pretty rough texture, bit to much for my taste. I dont like the font and some of the modifier icons, but probably the best shine through PBT available.