Quartz watches "tick" only once per second. Mechanical watches move generally 6ish times a second, causing a perpetual movement. This makes them better for measuring things in fractions of seconds than a quartz movement.

> only once per second

That isn't generally true.

Here's an analog quartz chronograph that has 1/10 second dial: https://youtu.be/mPP3EeWdJsA?t=97

If you are talking about a sweep second hand, there are plenty of quartz movements that do that.

If you go for digital quartz, you can get 1/100 second accuracy in a $10 watch.

The longer you time something, the worse the mechanical watch is going to be. Most of them gain or lose several seconds every day.

Zenith is the only manufacturer that I know does significantly better than this, but that particular movement is pretty rare and extraordinarily expensive.