With a landing weight of 60T it was VAPP of 135kt in F3 and 138 for conf Full.
the 320 NEO was Vapp 140kt conf 3 and 130kt conf full.
Weird that in conf Full the speed is actually 5kt lower but in Conf 3 it’s 2kt faster. Any explanation for that? the flaps and slats extension are exactly the same. IAE and PW engines.
You may be flying CEO in IAE and Neo in CFM. Compare Vref CFM CEO to CFM Neo. In CEO for 60T Flap full is 130kt and Flap 3 is 135 and in Neo it is Flap full it is 124kts and Flap 3 it is 134kts. As I said before the Neo Sharklet increases wing area so Vs1g will.be little less so 1.23g which is Vref is 5kts less than CEO. But in Flap 3 as it is tail clearence is less so they have added 10kts instead of 5kts as in CEO.
I think 321 has double slotted flap that keeps the attitude low.