Rebated doors have rebate, what means half-groove in the sash construction. Doors are not aligned with the door frame, but they have visible hinges.
Non-rebated doors improve the design of the door construction where the construction is aligned in one level with the door frame, which allows us to hide the hinges by building them in. Cheaper variant of non-rebated doors is beeing produced with visible hinges in rebateless door construction.
Rebateless door with visible hinges
Reference of rebated door with profile cassette in the sash
Reference of rebateless door from Rimavska Sobota