What is the different between Classic and No Taxi - Deathwish

Only difference is Classic doesn’t have om0 but No Taxis - Deathwish does have om0 (transferring checkpoint progress)

Should also be viewable with the "View Rules" button next to "Submit Run" on the right side for each Category/Sub-Category. (It doesn't call it om0 there though, but "Transferring Checkpoint progress" like goxaviergo mentioned.)