While both of them have the ability to provide service, they both "suck" when it comes to getting something done with Verizon. There doesn't seem to be enough sense of urgency from both parties.
XO Shut down one of our T3s a long time ago due to a billing error in their system and made no attempt to contact us in advance to resolve it prior to disconnecting it. We had to argue for 7 hours before someone got enough desire to re-enable the circuit.
ATX doesn't seem to have much data clue from my previous dealings with their NOC but then again, I eat tier 1 guys for breakfast usually.
That's just my 2 cents from my own experiences of course.
