Zealios are the first custom switch to come from a "switch artist", Zeal. We have Zeal to thank for all the competitive switches in the market. MOD Switches roots stem from ergo clears but the idea came to fruition thanks to Zealios.
Zealios - Tactile feeling for the different weights:
Aqua Zilent - Silent Tactile (most Tactile from Zeal PC)
Blue Zilents V2 - Silent Tactile
Roselios and Sakurios - Smooth and Silent Linears
Please note that PCB mounted switches can still be used in many plate mounted keyboards. As long as your PCB underneath has 2 extra holes next to the center post, it will support PCB Mounted switches and add extra rigidity to your build. If your PCB does not have the extra holes, then you can simply cut the small plastic legs off to make them Plate-Mount!