Not a big difference and by no means is it a duplicate of the Sony RX100. That person has no concept of the fact that a sensor is just one part of the final image. This isn't a back lit sensor. The differences are small. The video improvements are slight at best. No greater range than the P4 as that was marketing hype. Side sensors are useless in P mode, and the 100mbs trans. rate is way too small for 4k 60fps. Stills are a bit better though. The H.365 has banding issues and in my opinion the P4 is 90% of what the
P4P is. My guess is that the P5 will be a bigger difference. I'm disappointed that the range is the same as the P4 and the battery is at best 24-25 min. A far cry from 30 min. You can get a factory refurb P4 for 799.00 now and its a great deal as you can save 600.00 over the
P4P.