If you like Europe... Boeing is better.
If you like Africa... Airbus is better.
If you don't like the Middle East and SubContinent... both go there regardless.
Airbus pilots sleep in their own bed more often than Boeing pilots.
So if you're single it's better on Boeing, if married suggest Airbus.
But then again, like Hook said, you don't get a choice so there
no point in picking. And a rule of thumb, never pick a fleet based on where it flies to. What's 330 today might be 777 tomorrow and 380 next year.