As mentioned last week, I just received a Type A from down under. And I already have a Type B (two, actually). And as I pointed out when I posted pictures of the Type A, the square hole didn’t align neatly with the head as it does in the Type B.

Which means, logically, that there has to be a difference in the head geometry between the two models. In the Type B, the blade has to be parallel with the sideway of the razor. In the Type A, it ought to be inclined somewhat. And that should be possible to see in a side-by-side comparison.