idk how to answer it
but on short
OpenLiteSpeed is near the same to Apache.
if you have any sites that use apache. you can run it that too on openlitespeed
php and other's things same....
the good things that i like from OLS is they more faster and can handle alot of visitor than booth apache and nginx
so yeah... that's it...
some people on past already tested it again... so the choice is yours 🙂