OpenLiteSpeed: The battle of web servers is not over?
It is not free!
OpenLiteSpeed vs Nginx in WordPress - TTFB, Load Time, Stress Test Results
As you’ve noticed there no much difference in TTFB and fully loaded time for both. However, OpenLiteSpeed can handle a very high number of requests per second even on a small VPS of 1GB RAM. So if you’re running a high traffic website or highly dynamic website which cannot be cached, give OpenLiteSpeed a try.