Reliable switch are important to make sure every click registered an input. One random failed input can cost you a match.
Omron is one of the best microswitch manufacturer in the market. Their switch are reliable and consistent, used in many industrial applications.
1set = 4pcs
for wiring, connect to the COM and NO prong
Hard switch are more tactile, you can feel the "click" when register inputs, this feedback click is important for the users who are not rely on collar to make inputs (Korean playstyle).
Medium switch are smooth and not adding much tension to the lever, easier to make input. This is good for users who prefer using collar to guide inputs (Japan playstyle)