There is no magic with the sport filters, they do improve response and have some benefits over paper ones in certain weather/ humidity etc levels.
They are re-usable as they can be cleaned, so they do offer also a financial benefit over a period.
i have an AD foam filter in my GT 3.2. the thing i like most about it, is the 'dry foam' design, rather than an oiled filter. it makes it a cinch to clean, dry, and reuse. no messy re-oiling procedure.
does it mean it doesn't filter as well? possibly, but it looks pretty good to me. and i think our driving conditions in Oz are fine - unless you do mostly dirt road driving, which i doubt.