I just noticed that the printed rulebook in my EotS reprint is copyright 2015, while the latest version available from GMT (via link to Mark Herman's website) shows 2014. Both show "V. 3.0" in the lower-right corner.
is there any difference/errata between these two rulebooks, or are they the same?
There should be no difference. The rules were finalized in late 2014 but printing occurred in 2015, that's probably the source of the different years.