As far as that goes, there almost isn't any. A bunch of cherry derivatives plus matias, is still basically cherry and matias. Not only that but nearly all random mech keyboard manufacturers already did use cherry and now that cherry can't make enough the only change they are making is to switch to a cherry derivative.
There are only a couple of keyboard with Matias switches, and besides Matias-made whole keyboards none are on the normal marketplace and they are targeted at enthusiasts only. There was one Matias RGB board shown off a year ago at a CES type thing, and there has been no mention of it since.