Additives, some are the same and some are not.
The oil I switched over to Amsoil AMO 10W-40 meets or exceeds the following specs:
API SL, SJ, SH, SG
API CI-4 Plus, CH-4, CF, CF-2
ISO-L-EMA • Caterpillar ECF-1
JASO MA (Motorcycle) • MAN 271/3275 • MTU Type 2
Cummins 20071/20072/20076/20077...