Most 2009 Beatles CDs were mastered from the original, stereo analog master tapes, but "Help" for example, was remastered from producer George Martin's 1986 digital master. "Help" is not one of the better ones, that's for sure.
And I was listening in a dead quiet room, add some background office or street noise and the differences would be even harder to hear. Rather than buy the new Beatles CDs, buy better headphones or speakers. They would make the Beatles music you already own sound better.
They're good, but do the remastered Beatles CDs offer a big enough sonic improvement over the 1987 CDs to make them essential? Listening over my high-end, two-channel system they absolutely do! But to show up over an iPod, system, or computer speakers?
And hey, if for some reason you don't like the way they sound or simply don't want to spend the money, don't worry: The long-awaited release of these remasters guarantees that within weeks, the old Beatles CDs will be available at garage sales all over the country — at bargain-basement prices.