I've compared various versions of the library, but don't recall some of the results. An eye opener for me is that the SD versions still use the "old" pars that were incorrect as of CS4. When you add one to Encore, it makes the correction, so an "edit in photoshop" shows it correct, whereas opening such a menu directly in Photoshop shows it has an incorrect par.
That is when I concluded that it really didn't matter.