Most people seem to perform the omote without the nikyo lock and rely on the elbow for control. To me, that is ikkyo with an incidental hand position on the wrist that looks like nikyo, but it is not nikyo as the center is controlled through different means.
I was just training over in Japan, and they did nikkyo omote like this (it looked like ikkyo but with a different hand position). It looks completely different the way we do it here, though, cutting down ikkyo first and then drawing uke back in and applying nikkyo. Interesting, the ura version was the same in Japan as what I'm used to.
I'm not really experienced enough to be able to say which is better, but I agree with you that if just the hand position is different, it doesn't seem like a separate technique.