[He doesn't know either. He knows that he's been training for longer, more consistently, so that's what explains the difference now.]

Not so much, but it does mean that you've mastered Super Saiyan, and that means it should be easier for you to go to the next level. If it works like I think it does, anyway, without using anger like I do.

[Now they just have to get his base level to the point where it'll trigger the transformation...he thinks. He kinda stumbled onto this, himself, but he spoke with Goku and Gohan on the matter in the past.]