Rotella since it has the certifications. Last I checked, Delo did not have any JASO ratings at all for wet clutch/shared sump use. It may work, but why risk an expensive engine on a trial when you don't need to?
Used Rotella extensively in all my bikes, quads, and yard equipment over the years with zero problems to report. All except the old Harley I had because Shell don't make a 20W60 motorcycle oil for an old school Shovelhead H-D! Lol
2004 Toyota Tacoma 3.4 V6: Mobil 1 AFE 0W-30, FRAM PH3614 filter
2003 Buick Park Avenue Ultra S/C 3.8 V6: PYB 10W-30, FRAM COR3387 filter
2013 Honda 400EX ATV: Mobil 1 Racing 4t 10W-40, OEM filter