This wikipedia page shows that it's a bit under a factor of 5 difference between the two (based on StatCounter data): https://en.wikipedia.org/wiki/Usage_share_

This wikipedia page shows that it's a bit under a factor of 5 difference between the two (based on StatCounter data): https://en.wikipedia.org/wiki/Usage_share_of_operating_systems https://en.wikipedia.org/wiki/Usage_share_of_operating_syste... But as you can see later on in the entry, StackOverflow's survey shows the numbers as being much closer. So your target audience matters. I'd expect that software developers aren't the only set of users where the ratio is far off of the average.