WatchGuard’s Threat Lab is a group of dedicated threat researchers committed to helping you stay ahead of the bad guys by providing in-depth analysis of the top security threats to your network. Check out this quarters report on the threats that shook the industry in Q4 2017.
1) Not all applications are designed to take advantage of multiple processors, and I don't think you web server software would.
2) You will not receive full processor availability of the DUAL pentium computer due to the overhead of managing the traffic to and from the processors.
3) A bottleneck exists in the first system also, with the 66Mhz bus.
If someone can discredit this go ahead, I am always looking to learn more. Please provide supporting articles so I can read them also.