I noticed that even within the IAE V2527-A5, there are variants.
What is the difference between the:
and are all certified for the A319/320?
In addition to standard ratings, IAE also offers the V2527E and V2527M ratings. The V2527E is an enhanced rating for the A320, which provides additional thrust at high altitude airports. The V2527M rating is used on A319 airliners and the A319 based Airbus Corporate Jetliner to enhance payload and range capabilities.