They both look like quality oils wonder what the difference is?Schaefer Mfg. Has 3 10w30 HD oils to choose from. My current fill is their 9012 full synthetic...
https://www.schaefferoil.com/documents/296-711-td.pdf
https://www.schaefferoil.com/documents/289-9012-td.pdf
https://www.schaefferoil.com/documents/298-722-td.pdf