The Zealio switches are manufactured by Gateron. The outer shapes and internals are virtually identical to Cherry MX. All parts should be interchangeable except for the leaf springs that perform the electric switching. Cherry leaf springs fit inside Gateron housings but Gateron leaf springs do not fit into Cherry MX bottom housings. The copper leaf springs have gold-plated cross-points but which are rotated 90° from MX internals. All Zealio switches are PCB Mount.
Note : 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.