High Quality: WTI is considered a "gentle sweet" crude oil, and that is simpler to refine, even though Brent can be a blend of crude oils, including each "light sweet" and "major bitter" grades. Screening is by references that POs question each other for, not by posted assessments or from https://maps.app.goo.gl/VhAGTRCDGTuVhHJa8