As dub flips and other big off axis rotations continue to evolve, it will become impossible to definitively classify them in terms of the rotation.
Is a kang flip a rodeo 9.....or is it an underflip to a rodeo 5? Is Pete O's trick a misty 5 or an overflip? Who knows? The truth is, that the axis is slightly different each time one of those particular tricks is thrown, therefore leaving defiining of the trick "mathematically" pointless.
In this case, Jacob's 12 was clearly more "corked"...maybe so much as to be more of a d-spin. In my opinion, PK's 12 was thrown on a more stylish and photogenic axis. However, Jacob's appeared to be more technically difficult because he did clearly invert twice. I'd say that Jacob's trick looked slightly more gymnastic or aerialish...not necessarily a criticism.
Trick naming aside, they both pushed the level of progression, and they proved that it is possible to inject style and personality into a super tech trick. Thank god.