chillyfairy Solus follows the same naming convention everywhere. All kernel modules for the LTS kernel have no suffix while modules for the CURRENT kernel are suffixed with -current. See here for some more similar packages.
Originally the only kernel available was a LTS kernel (thus no suffix were needed). Later, CURRENT kernel was added in the repository but LTS was still the default, so the new packages that contain modules for the current kernel were suffixed -current while the existing packages kept their original name. That's why they are named this way.
