During installation - p2p or not


During installation, Comodo ask a « p2p » configuation or not.
What is the difference after Comodo installed?

→ I suppose the difference is just in the global rules, isn’t it?

In the Global rule, I have “Block and log ICMP From IP……”.
If, during installation, I chose “I never use p2p” (or something like that), the Global rules would be more restrictive. I’m wrong?

Thanks and…the final word ……this firewall is simply ….great.