Any time you consider which of two cameras is better, you must qualify the questions and answers with better for what? The reason there are so many different cameras on the market, and even within the offerings of a particular manufacturer, is that there are many different users and uses for those cameras. What works best for one use case does not necessarily work best for all use cases!
Specifically, how significant the difference between two cameras in terms of their Dynamic Range capability is to you can only be answered in light of the use you intend for your camera.
For example, assume you are shooting fast action such as sports played at a world class level. You would need a camera that can capture images at fast shutter speeds, has high frame rates per second, and can sustain that frame rate for multiple shots without getting bogged down with writing the images to the memory card. You would also need an auto focus system that is highly configurable, extremely fast, accurate, and consistent from shot to shot. And you would most likely need to do that at least some, if not all, of the time while shooting in artificially lit sports arenas, so you would be shooting at relatively high ISO. The difference between 13.21 and 11.16 EVs of DR at ISO 100 is totally irrelevant when you are shooting at ISO 3200 where both cameras are almost equal at 9.06 and 9.09 EVs respectively (using the actually measured DxO "screen" scores rather than the mathematically calculated theoretical "print" scores).
On the other hand, if you are doing long exposure landscape photography of high contrast scenes the handling speed, frame rate, AF speed, etc. is equally immaterial and the 2 stops difference in Dynamic Range at ISO 100 might well be the most significant difference between the two cameras for you.
There are also many use cases that fall somewhere between these two extremes. For each one the significance of the difference in Dynamic Range between the two cameras would rise or fall in relation to other considerations.