There are more and some newer voices in the EA7, particularly piano.
Drums sound the same to me.
Intro one on most of the EA7 styles has been reworked to use as a break/fill.
Regarding the charts, I really prefer to put my chord changed in line with the lyrics. Like "Your cheatin' [1] heart, will tell on [4] you. You'll cry and [5-7] cry, like us old farts do...."