Lower teeth are narrower because they fit inside the upper teeth, otherwise they do look better!  That would make them less 'spade'-like,IMO. Lower teeth have rectangular tops.  Look at your own teeth!  You do have lower teeth? :blink:  Maybe I assume to much? :laugh:

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!