What is missing?
Looks like we need to add a "K" to row4.
nubsa re another difference: he's not swapped the H and J keys to the other keyboard. It's not an issue, because they are replaced in this set anyway, but do we need nubs on H and U? I notice U is replaced anyway, but H is just moved over one, and won't have a nub.
so there are three differences: U, H, K; one is irrelevant, because "U" is replaced anyway. H is on the same row, and could theoretically be moved over, but won't have a nub or whatever.
so, you'd have to add a nub U, a nub H, and a K to row4 to be fully compliant. For sets without nubs (or people that don't need them, like me) only a "K" is needed in row4.
Also, I really want to order a Dvorak kit (especially in spherical), but I don't think the quantity will be high enough. :(