The PHX is:

3 cables?
double oreilettes interchangeable.
Good sound, high volume output.
Great look.

The PHX is less well:

The price, it can go but ... .
The size of the headphones, personally, I very badly after 30 mins: too small! (This is really annoying).
Weight: a bit heavy, personally, I very badly after 30 mins: too heavy!

Concluded the last two scores win, I want to change mine)