Yamalube S2 vs M2

[1st grady]

I purchased but did not yet use some Yamalube 2S from a motorcycle shop (on sale) Is it different from the 2M typically sold in marine stores? It states on the carton that it is for injected 2 stroke motors and is semi synthetic. I run a Yami S 150 txru motor. Please Recomend to use or return? thanks
BH

[boats.net]

I'm not that familiar with the motorcycle oil but the outboard oil TCW-3 which means it's for two cycle watercooled engines. I would use the 2M oil.