It seems to be not clear to GH community about which stabilizer Keycool uses. Maybe I can help.
The old Keycool keyboards (KC87 and 104 generation 1 and 2, etc) used co-star stabilizers while the new Keycool keyboards (KC87 and 104 generation 3+ and those Kailh switch products) all use cherry stabilizers.
I guess it is because using cherry stabilizers can reduce the expenses of labour of installing keycaps.