Umb is there (or can there be) a way to force which one is used - I really like the mobile format but I can't seem to use it in a desktop display!
On mobile we use the native device date picker, which is different from Apple to Android and between browsers.
This date picker is often implemented differently for desktop versions of the same browser (ie. Safari, Firefox, Chrome, ...) and is usually not available in the same form - though it depends on the browser and version.
We would have to implement special cases for various combinations to offer the native date picker on desktop - and it would, in most cases, not even look/feel like the one on mobile. Sorry :(