K&N vs Pipercross

[AChilvers]

I apologies in advance if this is the wrong place for posting this!

I have a 2010 Alfa Romeo Mito TB Multiair (135) and i'm looking at changing the air filter to a CAI.

I have come across these 2:

K&N 57S-3300 Performance Air Intake System
&
Pipercross Universal Venom Filter 100mm Intake VM7100

I'm looking for some feedback on these 2 products & which others would recommend.

If anyone has any personal experience with either of these products, i'd love to hear your thoughts (more so with the Pipercross)!