I have a Green Panel Filter in my 200 and the (non measured) benefit is that it looks green! Which has to be liked by you to be a benefit for sure...
Oh yes, and if i drive the car for about 2.000.000.000. miles the price difference between paper exchange and the grren one will be on the good side for the green!
honestly, only thing i can say is what i could read on the internet. not really a performance plus if its a stand alone mod, but definalty better than all the other filter options because you WILL lose power with them (except Clio V6 Box etc.)