There is a price difference, Tire Rack shows $20 more per tire for the P205/55R16 compared to the P205/60R16.
I switched from P185/60R15 to P185/65R15 on my Dodge, I wanted the additional height/road clearance.
Some people are afraid to step out of line. I have the wrong size tires on all of my vehicles, I don’t have E70B14 tires on my Plymouth.