The Kesel and Johns versions are different in more than just origin though. Personality, powers, background, character, and even species. One was 100% human because Superman couldn't be cloned at all (still human when he grew up and all alt versions were human) while the other is a hybrid just because (they never even bothered to explain how he was Superman's clone all of a sudden at the beginning of Titans. Even the Cadmus files were wrong.). One had no Kryptonian powers and had telekinesis because of that while the other did. One didn't have a single code word in his head and other did. And so on and so on. From reading both Titans and Reign/Superboy/Etc., Kesel's original Kon-El is not Johns "Conner Kent" and "Conner Kent" isn't Kon-El. Johns may have intended it to be the same, but the books said otherwise and none of it syncs with each other.