at 60 Hz, your display updates every 16.67 ms
at 144Hz, your display updates every 6.94ms
This gives you a 5/12 ratio.
At 60 fps, your 60Hz monitor will display natively at a 1/1 ratio
At 144Hz, you have to hold each frame for 2 or 3 frames, depending on timing. SOME people notice this as microstutter.
The opposite is true as well, and some people state they have stutter on their 60Hz monitor when the focus is on their 144H monitor.
While there are various ways to minimize this depending on your OS and what your programs are doing and what mode they are using (windowed vs exclusive) and hardware acceleration or not in your browsers, it is a use by use / case by case scenario it seems.
Googling dual monitor stutter would probably...