I know Total Choice vs. Choice, the new "choice" had 13 less channels when they transitioned.
The Total Choice Plus and new "Choice Extra" should have the exact same lineup from what I can tell.
The change was to fix in a $3 grandfathered discount for older subs, and move some channels to the xtra tier to encourage the $5 upgrade. Stations like WGN were moved up a tier.
I don't recall any difference in channels on the plus / xtra packs.