Truck Debates - Why does it seem to be mostly Ford vs. Ram?

I have purchased new a string of GM big block trucks starting in 1972 .
I swayed in 1987 and again in 1992 to a Ford .
I am back to GM .
I even like the idea of a Cummins .
However , I hope to never own another gas pickup .
Diesel is so much better .
I will not diss the Ford or Ram guys .
The new trucks are all so good now that it is a moot point .
Although the Eco-Boost crowd has some vocal proponents who think they own a freightliner !