Pixel 9 vs iPhone

I can't look at the iPhone 16 Pro screen for more than 30 mins at time without getting really bad eyestrain and weird forehead sensation symptoms.

I tried all the brightness settings and enlarged the font on all the whitepoint settings, and it just was not something I could use.

Recently, a family member got a Pixel 9 and asked me to help set it up. This gave me the opportunity to use the phone for several hours.

After using the Pixel 9, I found that the best brightness setting I could use the phone at was 60% and above.

I'm not sure what this means in pwm terms compared to the 16 pro, but I would like to know because I would prefer to own an iPhone.