Excellent: WTI is considered a "mild sweet" crude oil, which happens to be easier to refine, when Brent is really a combination of crude oils, together with both of those "light-weight sweet" and "large sour" grades. Screening is by references that POs check with each other for, not by printed https://thedeepdirectory.com/listings13226040/indicators-on-oil-you-should-know