Dunno, currently on an international flight, have been swapping out the APP3’s and my XM5’s while watching the same movies and listening to the same playlist. The APP3’s are -vastly- superior to the XM5’s. Better overall sound quality and the ANC is even better. Don’t have that “hollow” sound of wearing cans over your ears either, and the automatic ability to hear clearly from the FA’s who are serving us dinner is a nice bonus also.
If you cannot tell the difference, it’s likely because of a fit issue with the APP3’s. Hopefully, we will have some more options available soon when the foam tip market becomes flooded with replacement tips.