Ja mam pocit, ze mi z naked portafiltra ide viac kremy (ale nie zas dramaticky). Plus ako si dole pisal, viem sa pozriet ako som utlacil a proste to vyzera dobre :).

Edit:
https://www.espressoparts.com/resources/barista-basics/bottomless-portafilters

Crema. In the hands of an experienced barista with fresh espresso beans, a bottomless portafilter will yield 50% or more of Crema. Why? Well the answer is simple. Your espresso shot will come in contact with no other surface than the bottom of you portafilter basket. No portafilter bottoms and no spouts. This keeps the tiny Crema bubbles we all look for in a perfect shot intact and unharmed. Furthermore the lack of a spout will give the user more cup clearance and allows espresso extraction directly into the cup for serving in most cases. Of course in most cases for to go cups larger than 12oz, brew vessels of some kind will still need to be used.