I have flat feet & knee problems but I love running so picking out running shoes takes a lot of time.  My favorite is New Balance 8505.  This one compared to 8505s:

1. Slightly thinner bottom cushion.  8505 is better in this department.  Average person may not notice the difference.
2. Better design/color combos.
3. Better looking mesh material.
4. Slimmer front.  Fits average to narrow feet better.  I like this one better than 8505s because it is snug.
5. Shorter Laces.  No need to double tie laces which I like.

Overall great running shoes