For p3d Fslab for sure, more detailed and pro than the others
And for X plane, Flight factor is perfect and for the a319 I recommend Toliss
FSLabs is the best and can't even be compared to any others.
As people stated, A to B, Aerosoft is good enough. For much more immersion, FSLabs is the real deal
my vote is (obviously) the flight factor ultimate a320
If only FSL has sharklet variant. I would go there
if you have xp11 the best is the ffa320
for p3d I prefer Aerosoft, it gives me good frames and has all a318 to a321
For X-plane FF all the way
I like FsLabs sound and cabin lights, are awesome. But unfortunately is very heavy performance-wise. It partially kills my experience in Autogen heavy areas. I prefer for those Aerosoft's, which is very, very good too (I like the 330 even more) and the performance is great. Would love FsLabs sounds in aerosoft.