In addition to this, the Gym Leader A.I.s have been upgraded a whole lot compared to normal trainers to the point where it is not uncommon to lose your first match and require switching out members of your party due to Gym Leader having an attack you unexpectedly did not see coming
Features of these games include
New regions (starting with Vega)
Custom OST (starting with Vega)
Somewhat questionable new evolution paths for existing official mons.