This is false DJI propaganda, don't believe everything DJI says, like 28min flight times, HAH!
You should measure this yourself since you have both craft. It's simply not true.
When you sit both P3 and P4 side by side the props are identical in height in relation to the surface. But.... when you measure the camera height you'll find the P4 camera is actually 9mm CLOSER TO THE PROPS. This means the props are in essence lower in relation to the camera and props will enter into view sooner on P4 versus P3. The difference is very slight, but the P3 is better in that regard.
If there is any benefit to the P4 regarding camera ergonomics, the P4 camera has 9mm more ground clearance than the P3P camera when landing.
I own both P3 & P4 craft. If I lost the P4 the only thing I would miss is the extra 3-4 min flight time over the P3, that's it! Oh wait, I'd miss the clip on props too.[emoji106]