When I bought my first F350 back in 2011 I felt there were a number of little things that made Ford a better choice for me than what GM and Ram were offering. Things like power tow mirrors, tail gate ...
Ram had the best value truck last time I shopped. If prices were equal across all three lines, my choice would have been the Ford due to configurations that fit my use the best. Although I have nothing against GM trucks, their vehicles don't fit me well ergonomically and I never subjectively liked their interior or exterior styling.