spec help pls

So I need a new desktop for league on the budget, and I'm not that great with specs myself. Would wondering if anyone that knows their stuff could give me some advice on whats the better buy.

1st Computer Windows 8.1 64-bit; AMD FX-4300 3.80GHz 8GB of DDR3 memory; 1GB NVIDIA GeForce GT 720; 1TB HDD; Cost:$550

2nd Computer AMD Quad-Core FX-4200 3.30GHz, AMD RADEON HD 7730 1GB GFX , 8GB Memory , 1TB HDD, on sale for 579.00

okty