How do the piccolo trumpet P1C and P2 leadpipes play different?

Edited

Most players notice improved slotting, articulation, intonation, and overall playability improvements when switching to Blackburn leadpipes. The P1C will feel slightly more open than most stock piccolo leadpipes, but the P2 takes this a step further and offers a more robust, open feel. It truly comes down to personal preference, but the P1C is a great place to start.