I do not know much about audio, do these sound cards both have DACs and AMPs that perform similarly aside from the features? Are there any better, or similar performing external sound cards for a lower price? (USD)
For use with a headset for both mic and headphones, nothing would be any better for the same price. For just with a headphone, there are better options, but for a bit more money, the "good" stuff starts about 20-50 higher.
Since you said you don't know much about audio, why are you looking to buy these? What headset/headphones do you use?