Are you talking about Premium Blue Extreme? There are two different grades of Premium Blue - both diesel, one conventional and one likely GIII and higher.
If you are comparing 5w40 Synpower to PBE, Synpower only carries diesel rating up to API CF, PBE is CI4+, as of now according to website. TBN of Synpower is 7, PBE is 12. PBE doesn't list any ACEA specs, but best guess it would be E2 or E4 if it did, Synpower is C3.