In short, for me, no. Unless you collect whole series' of SW figures or are after a particular figure you don't have or wasn't released previously like Plagueis.
They are similar, if not existing sculpts. A SW figure aficionado could probably list all of the differences, if there are any. From what I've seen, there are some subtle differences such as:
Mace Windu coming with Jango Fett's helmet & white gauntlets
Darth Vader with a new accessory to portray the scene on Bespin where he deflects Han's blaster shot etc etc
While the packaging is nice, in essence all Hasbro have done is replace the Vintage Collection with The Black Series. They've also introduced a basic range ($10) as an alternative- these only feature basic articulation.