Just went to the same... After using the 11 Pro (5.8') 64gb for a 10 days I couldn't see anything that either justify the price difference or will really miss me.
I previously mentioned 6 advantages / benefits for the 11 Pro:
- Pocketable size/one hand use
- Brighter Oled Screen
- Additional Telephoto Lens
- Slightly better battery (in theory)
- Better build quality
- Fast Charger in the box
But at the end of the day the only one that will be missing me the most is the Pocketable size/one hand use. All the other items will be not missing me really so far and I can see the following advantages:
- 128gb Memory size option
- More information on the screen (like the Max) but right the phone is bigger than 11 pro

- Battery life still great
- Price / Best value for money
- Screen color temperature is less warm and without extreme color shifting compared to OLED
So if I can handle the size and not find it too bulky for my every day usage I’ll stick with this one.