I have seen these questions asked many times and even asked it myself but have never got a definitive answer . . . . until now.
'Is the catalytic converter fitted during the Esseesse upgrade an uprated/sports cat?'
and
'What is the cell count of both the standard cat and Esseesse cat?'
After many emails and telephone calls I have had the following information confirmed by Abarth HQ in Turin:
The cell count for both catalytic converters is 600. The only reason the catalytic converter is changed during the Esseesse upgrade is for connecting compatibility to the replacement Garrett turbocharger.
I thought this info would be useful to share as i'm sure many believe, as I did, that the Esseesse cat was an improvement over the standard cat.
This must strangle the performance quite a bit so it's time to source a nice 200 cell sports cat and see what happens

Has anyone changed the cat on their AGP (NP or SS)?
