Darkbreeze :
That really depends on what the EXACT models of the included power supplies are for each system?
As far as the CPU goes, the system with the i3-4150 is better, but it also has less memory (RAM) and a lower capacity power supply, which might not matter if the power supply is a better quality model than the other one but we'd need to know the exact models to even guess at which would be the better choice AND you would definitely NEED to try and find another 4GB of memory to add to what it already has so knowing the model of the memory that comes with that system in order to determine if finding a match for it is going to be possible (Which still doesn't guarantee that the memory will "play nice" together).
Honestly, for systems that old, you REALLY want to find something with AT LEAST an i5, and preferably an i7. Those old i3's were not very capable at all, for gaming anyhow. And they are even less so now these many years later.
Um...I've found also a sistem wich has an i5, 8gb ram, good power supply, good price, but is a first generation i5, i5 750, wich has 4 cores and 4 threads, if I remember correctly, i checked ark.intel, but is old. Even it will run with that HD 7870 all kind of esports titles, but in like 1 or 2 years, ehm... let's say it will not be that "good" anymore. So yeah.....
"you REALLY want to find something with AT LEAST an i5, and preferably an i7". Oh gosh, at least in my country, prices for computers are high in comparison with U.S. for ex. for a i5 Ivy Bridge sistem with 8gb ram, you will play around 300$. So yeah...Of course, you can get super good deals, like i've found 1 month ago, a sistem with an i5 Haswell gen. 8gb ram, gtx 750ti, good power supply, 8gb ram, for only 200-250$ if I remember correctly.
I will not stop searching, and I will come back if I find something interesting! Thanks!