nicedude80 :
Is there aerformance difference between i5 and i7? Also will the top build be able to run games at high with good fps? Which build is better? Because of course the lower the money the better, but I want it to run games good.
i7s are higher end processors than the i5s; they feature "hyperthreading", which generally allows some software applications to run faster. Others know a bit more than me on this, but my undersatnding is most pc games don't take advantaeg of hyperthreading.
I think general wisdom is that for gaming, you want to spend most of your money on the GPU. Your GPU is more likely to bottleneck you than the CPU.
One key thing in the two builds proposed is one is an ATX solution, the other a micro ATX one. Generally, ATXs are bigger, and more expandable. If you wanted to run two GPUs in an SLI config, move to water cooling, add other components, more HDDs, etc, you can do so with an ATX case.
Woltej1's proposed comp has a K processor, meaning you can actually overclock that chip, getting a bit more CPU performance. Thats why he included a aftermarket CPU cooler, to facilitate keeping the chip cool as you squeeze some more performance out of it. He also opted for less RAM, but you generally don't need more 8 gigs of RAM for games anyway, and he went with a higher end GPU (which is where I suggest you spend your money if you want to play games on the best settings). Damric's solution doesn't include an optical drive...do you need one?
On the other side, maybe you want a small form factor - if so, maybe Damric's solution is for you.
If you want specific guidance on what those two proposed GPUs will play certain games on (the settings, I mean, like ultra, or high), you will have to ask the specific question. I'm not as knowledgable on that end.