The one you have is fresh.
But its same batch, same stepping as the chip used for that run..
Right out of the box it did 4G @ 1.38v. same setting as old.
This stepping can take you to 4.8 SPi benchable on air for sure. Will need some work to get there though. But with P5B Dlx you wont be able to match the scores of P35 boards

Specially that IP35 Pro run.
The next set of batches which are now selling in India ate 807 and 808 week.
807 seems decent. But 808 is PITA to clock above 4.2-4.3G even after pushing some voltage to the chip.
None of them are as good as Q746 which is now all sold out.