While my question is about running shoes, it also pertains to classic shoes in my opinion. I hope you won't mind me posting pictures as I think they will contribute to this question.
I have bought pair of NB running shoes and noticed that while my left foot feels good, my toe on right foot feels that shoe is tight.
See pictures below I have made as I am curious to hear your opinions:
Here's sides comparison where you can see that right shoe looks a bit different...