After a few months of usage I can say I am satisfied with the upgrade: the display of the MI5 is way better than the old one, the sensors are more precise and the overall feeling is better.
Are those improvement worth the extra bucks? My tentative answer is yes.
Also, a long overdue (hairy wrist picture) picture.

I am going to add this picture and the one from the
@thebeardedwrist @TheBeardedBaby to the gallery.
I did not know there could have been people so crazy about getting merits and other sort of things! If I understand that bot basically connects your band to all your bitcointalk activities and you get notified for everything you want to see in real time. That's wundebar