I learned a valuable lesson this weekend.
When you have a closet full of old running shoes that are all the same style, you should pay very close attentions to which shoes you grab and stuff into your duffel bag.
Or else you may end up in the same predicament I did this weekend.
On the left is my current running shoe (with Road ID and all). On the right is a sneaker from two or three pairs ago.
They're both Mizuno Wave Inspires and they have a very similar color pattern, however, their padding level is not at all the same.
I learned that the hard way on my run this weekend. My feet were not happy with me.