in reply to Apache web servers for CGI-perl.
My suggestion is to find out by doing some testing, you can easily set them both up to run on the same system (different ports). Once you have done that, you can perform testing that will be very meaningful to you. After you have tested both with CGI, compare those results to Mod-Perl for Apache. As for my experience, I run both for some internal only sites, and both have their strong points and weaknesses.