in terms of employment and difficulty
computer science > mechanical > industrial
do you like a lot about physics?
would you like to know how to project mechanical members and structures with safety coefficients, designing gearbox's, shafts, beams, pumps, compressores, turbines? maybe interested in thermo aplications? analising how things work, and why they dont fail?
why materials behave the way they do?
this mech eng.