The 7.3 and it's variants will be much cheaper to build.
Demand will decide who lives and dies when it comes to these engine families.
There are early rumors of a alloy smaller displacement version of the 7.3, only time will tell.
I can say it's been since 1973.........Time to match gm in...
The 6.8 will most likely be of alloy construction.
GM's LT series performs quite well at every metric you mentioned.
Besides, Ford has done enough track cars.
The Mach1 was stale news right out of the gate.
HP uses X amount of fuel.....no free lunch.
It also creates X amount of emissions.....no free lunch.
Regardless of displacement.....
The 7.3 is far cheaper to produce.
Cylinder deactivation on the cheap and easy is now possible.
Remaining N/A the Coyote is only good for just over 800 hp