There is absolutey no way that these two men could every possibly be the same character.
The mere suggestion is ludicrous.
Also, in all geekish seriousness, I should advise that Kal's disguise of Clark Kent is based not so much on blatant physical appearance, as it is on a projection of false character. Clark is portrayed as a bumbling doofus precisely so you never entertain the idea that The Man Of Steel and the somewhat timid City Beat reporter at the Daily Planet are one and the same.
Batsy pulls the same stunt with his Bruce Wayne shtick.
But, come on now. That build, those shoulders, that jawline; and the fact that Clark is never around when Supes is, and somehow always reappears right after the Big Red Boots flies away? Lois pondered this evidence at the tail end of the first Superman movie, but dismissed it only because she couldn't accept that the two totally opposite personalities presented, were in-fact the sole and very-same man.