I never have been bothered by the fact the Wilson covers are only marked on the outside. When the cover is closed, it’s visible. When the cover is open, a non-operating manipulation easily reveals the marking. Alternatively, for interior-only marked cover, the marking is visible when open, but if the cover is latched, it takes an operating manipulation to reveal the marking.
Interior marks are great for instagram photos where action is implied by an open cover, but for quick identification in administrative situations - e.g. quickly identifying rifles in the rack where the covers are closed - I prefer externally marked covers.
Both is better if you can find it, but outside can pretend to be both, inside can only be one.