Most who are replying saying how big the ram HD is have not been inside a superduty. I have a 2017 ram mega cab and comparing to f350 it feels like 1/2 ton:
2 inches shorter in most dimensions and 4" less front legroom, the floors in the RAM in front are not flat, much much less room for your feet. Guessing people under 6 feet tall think ram is big, but its not even close.
For this single reason I am likely ordering new Ford unless RAM changes the cab. I see lots of chatter about transmissions, interiors, prices, colors, towing, powerstroke vs cummins but the CAB size is a bigger deal than any of those items for me at 6'5".