62k€ = 75k usd, 150 - 75 = 75. so assuming both numbers are before tax (and neglecting things like bonuses, benefits, equity, etc that you probably need to add into both numbers), there's your comparison.
Now the question to you is "is Lyon worth 75k/year over California". That's not a question of compensation, that's just a question of how much you value the difference in culture and society. Do you want to spend 75k$/year on purchasing universal healthcare (edit: I.e. your share of healthcare for everyone instead of what you purchase in the US, which is approximately just healthcare for you), a better public education system, a better social security system, less... American... neighbors, and/or whatever else you think Lyon gives you over California.
Edit: Accidentally had this saying "after tax" instead of "before tax" for an hour, I think everyone replying to me mentally corrected that anyways, but noting that I fixed it here in case they didn't.
This is getting off-topic, but maybe surprisingly, Americans pay more to subsidize other people's healthcare than the average French taxpayer does, despite the American system not being universal. Some back-of-envelope numbers,
France: Total French healthcare spending in 2017 was $337 billion, of which 77%, or $259 billion, was publicly financed. [1]
U.S.: Total U.S. healthcare spending was $3.8 trillion in 2019, of which 45%, or $1.7 trillion, was publicly financed (29% federal, 16% state/local, 55% private). [2]
Adjusting for the two countries' population sizes, that puts publicly financed healthcare spending at about $3900 per capita in France, versus $5200 per person in the US. Basically the somewhat lower public share for the US (45% vs. 77%) is outweighed by costs being about twice as high.
[1] https://www.commonwealthfund.org/international-health-policy...
[2] https://www.cms.gov/Research-Statistics-Data-and-Systems/Sta...
Thanks :)
[1] https://www.cabinet-roche.com/en/payroll-taxes-in-france/
There are websites [0] that will help you do the conversion Brut/Net easily