Dear, pl remember even in a batch we can't compare every chip because every chip is different (Sound Strange! This is a fact). Some chips will OC to 4.2 GHZ, some will OC to 4.7 GHz and there is nothing we can do about it. So it would be better if you can relate your query with more details that you want to know about. I'm afraid looking at only batch no/serial no there is hardly anything to be informed.
Regards,