yeah, building a laptop is a definite no for me. people always say that it isn't that hard, but it actually is. you have to have the go through all the trouble of researching what you need and what goes to what, not to mention the fact that you need a grounding set up so that you don't kill all your gear with static electricity.
So what actually determines processer speed, I want to make sure I know what speed I am getting.
I'm not talking about building a laptop, and I don't think anyone else is. We're talking about building a desktop. The amount of research time you're putting into this thread is more than it would take to go to the tech thread, and ask for help putting together a build, something that many of the members of this forum help with every day. Also, static damage is a very minor threat that is often extremely exaggerated, with people doing things to avoid it that don't even help, and the few things that do help are extremely easy (and really, the only one you need to do is not touch the pins on things while putting it together).
Processor speed is determined by every single aspect of a processor, of which clock speed is just one. The only sane way to compare processor speed is to look up benchmarks. Newer CPU architectures are much, much faster per cycle than old ones.
As for gaming, what's more important is your GPU, which the latest laptop you have posted has a terrible integrated graphics card. Minecraft can run on just about anything (though not necessarily that well), and is more CPU dependent than real games that aren't written in Java. If you want to play games, I suggest you get a desktop, as laptops are terrible for gaming, and much, much more expensive for any sort of hardware that can compare with a cheap desktop.