LHR,

If you are constrained by all of this to flying only either CO or VS and are wondering about which coach class is better, I would have to say CO. If you are on a CO 777, do anything you can to get rows 16 or 32, which are bulkhead. I like 32 better myself, although many people here will say 16 is better (16 has a hard partition in front of it; in 32 an AC and HK sides, which are my 4 fave coach seats on the aircraft, you have six-eight feet of open space in front of you, but these seats are close to the restrooms which is what people don't seem to like).

That all being said, while I applaud UpperClass and BusinessFirst - both are great products - I wouldn't say if having to choose coach international it would be CO or VS. My first choice for coach LAX LHR clearly is Air New Zealand, at 34" coach pitch compared to 31" on CO, not to mention awesome coach catering and tasty NZ beers. But I would choose AA, as well, over CO...MRTC makes a big difference on such a long flight.

My two cents.