Gnil,
with all due respect, thanks for this non-informational post!

I just mentioned I browsed all topics about the -20mm here...

I'm looking for info regarding differences in rollbars, possible setups etc etc...

not just: this is better, I'm looking for info why -20mm is better, not just because it's name is "sport-suspension"
Maybe even firsthand info from people who haven driven both back to back on a track...

hope I did not offend you