Which would be a better gaming pc?

Probably #1. I think it has more memory. Which is very important.

Well, If you're only gonna play Minecraft then both of these are a bit of an overkill.
But the 2nd machine is better because it has more RAM (8gb)
It has an Nvidia 610 graphics card, below average but still, it will definitely run Minecraft!
the processor is above average, it will handle minecraft very well
and overall out of 10, I'd give the 2nd machine a 5/10

I agree with Conor, it not only has more RAM but it also has a better Graphics card but as well as that its been reviewed by more people positively

So yeah, go for this one its 10$ more but its better and will give better performance

http://www.bestbuy.com/...&cp=1&lp=3" rel='nofollow' class='ext_link'>Http://www.bestbuy.com/...&cp=1&lp=3

Yah both are pretty much fine over kill for Minecraft graphics wise, so you have to look at efficiancy more than power while the 6450 is arguably a more powerful card than than 610 about 4x the shader Cores its not nearly as efficiant and has less memory to work with than the 610 for minecraft there would be no significant difference in Rendering Now the Machine with the 610 has twice the Ram, So loading maps and proccessing performance will be significantly faster than than the machine with only 4 GB of ram, with that said for Better perfomance over all for what your looking for your getting more bang for your buck with the GT610 and 8 GB of Ram thant the Radion 6450.

#1. Just trust me. More space and a better processor. It's windows 7 aswell. NEVER GET WINDOWS 8! Windows 8 sucks. Just buy more ram because 4 gb isn't sufficient. Get at least 8 or if you can afford it 16. Hope I helped!