First off, Delta's 767-400s and Continental's 767-400s are going to perform very different tasks.
The CO version will do transatlantic (cash-rich and high-competition) routes that are long and high-paying.
Delta's aircraft are NOT primarily going to be long-haul aircraft... the only long-haul route will be Hawaii - and Hawaii is notorious for being a non-profit route as people usually use Frequent Flyer Miles to get there, so no major airline uses transoceanic equipment for the Hawaii flights as it would not pay to do so... AA operates special DC-10s with 40" first class seats, same with UA, and Hawaiian, and Delta. No United First, no American First Suite, no BusinessElite. And this applies to all the major carriers. (I must confess I am not sure about the CO HI routes.) Delta's aircraft will be used primarily for flights to cities like Ft. Lauderdale - effectively up and down the east coast and occasionally trans-cons to LAX etc. (and of course the Hawaii ones) The aircraft will NOT be flown to London / Rio etc. Who needs a PTV on these routes? And PTVs are VERY overrated anyway. Ever heard of a good book? On a two hour flight to Ft. Lauderdale you don't need 60" of space, and you don't need PTVs in Coach.
Besides, the way that BusinessElite works, if you had BusinessElite in the aircraft, the fares would be around $4500 - a non-flexible price for a totally flexible ticket. Delta does not offer ANY discounted seats in BusinessElite on any of their official routes. The only ones where they do are the 777s & MD-11s running to Florida in the midst of their transatlantic services. If I was either to pay $4500 for a return in BusinessElite, and $1300 for a standard First Class, I would take the standard First Class! And this is the mentality of the general flying public too.
In CO service however, the aircraft will be flying DC-10 routes, to London, Rio, Paris etc. - a very different purpose for an airliner, with a whole different market structure. The aircraft will have far less cycles on their books than the Delta version in ten years time.
And secondly, the aircraft about that you call a CO aircraft is actually a DELTA aircraft that has been mocked-up in BOEING'S configuration for the world Tour. The First Class seats are NOT Continental's BusinessFirst product, altho they are remarkably similar. The Coach seats however, I conceed, are CO seats. But this aircraft will eventually end up in service refurbished with DELTA. And the Continental configuration may vary.
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