I'm a professional in the UK (British) biodiesel industry.

Your question is a good one, but can't be answered simply.

I would tell you to become familar with EN 14214, and ASTM D 6751 - biodiesel standards inside out.

In doing so you will find that various OIL (triglyceride) feeds can produce different properties in the final B100 (Biodiesel) due to example:

Saturated/Unsaturated Methyl ester component variation....
e.g. Palmitic, Stearic, Oleic,Linolenic acid methyl ester etc etc

This will affect - CFPPs, MPs, Iodine Values, Densities, Cetane numbers and many others.

I believe in order to balance COST and fuel properties - WVO can be blended, pretreated etc with other oils to obtain the correct balancing act at the end.

In your question - it depends on the technology utilsed! - such as acid-pretreatment/base catalysis can make high yield B100 from WVO... which can have better Cetane than say

virgin Rape/Soy derived B100....

It's such a huge area.... I'm only showing you a little bit of it.

Hope this keeps you interested.

M in the UK