Delo 400 the old formula used to have about 220ppm of moly, the stuff nowadys is like most motorycle oils 100 ppm or less. So moly is really a non factor with this oil. When you get up above 400 to 500 ppm of moly , then you get boderline clutch slippage possibility.
Personally, I rate the Delo over the Rotella for MC use. They both will work, I've just think the Rotella is too much clutch grip and makes the shifting notchy dependin on the particular bike.