Question

how much difference does 59hz to 60 hz refresh rate makes

Answer 1

There are no monitors or graphics cards, etc., which provide or operate at a refresh rate of 59.0 Hz; what is sometimes labeled as a “59 Hz” mode actually runs at 59.94+ Hz, which is the exact rate of the NTSC color television standard as used in North America and in some other locations. Monitors operate at this timing for reasons of video compatibility only; in terms of flicker, etc., there is absolutely no perceivable difference between this rate and an exact 60.00 Hz rate.