Well strictly speaking YES... but Hmmmmm more than yes 100%.
The P4 calipers were developed for the Ducati 996R and 748R and for early race homologation in WSB. They are arguably better but to be honest when i've used them (multiple bikes) they're ony a little bit better.
The standard Brembo goldline calipers are sweet as they are and with OE pads and new fluid will stop you in a microsecond.
If you get the P4's and throw on a set of Performance Friction pads, yeah they'll stop you, without a shadow of a doubt.
I'd trust both with my life.. none really more than the other.
The P4's also look a little prettier and the pad holding/removal system is a little nicer.
Finally, the P4 pads are a fair chunk more expensive for a set than the standard old calipers.
one thing for both... there's a set of pads on ebay, GOLD pads. They are the worst things ever made for a motorcycle.. do not under any circumstances use them.
Set of decent OEM or even SBK/SBS/Perf Friction pads, new fluids and decent lines... you're good with either.