I’ve been digging into the details of the new Apple devices as I found the presentation to be somewhat confusing. The first bit that interested me was the battery life.
(12 Pro: left & 11 Pro: right).
Reading the specs on the Apple site the iPhone 11 Pro and iPhone 12 Pro should be getting just about the same battery life. You can see you’re getting one more hour of life on the 11 Pro with video playback but in real use I can’t image it’ll make a difference.