I did single race arcade after single race phantom in campaign. In campaign i spent 2 or 3 hours to have gold medal, then immediatly did arcade and in 10 / 20 minuts taked 1° place.
Was not the same with reverse track.... they takes me 2 or 3 hours to keep 1° place, as forward in campaign... it's the same difficulty!!!

In tournament i think that the difficult is the same, but isn't the same AI ship that is the best in ever track!