That depends, are you using it for basic use or gaming? If it is for general basic use then either one of them should do the job for normal everyday task. Such as downloading music, watching movies or videos, etc. If it is for gaming, you might be able to play some games pretty well but as far as high end grahpic games like Gand Theft Auto 4, Grid, Crysis. You are going to need a more powerful CPU.
Diablotek EVO mid tower case w/ 4 case fans
AMD Phenom II X 4 3.2 GHz
ASUS ENGTX 460 TOP graphics card
ASUS M5A97 EVO Socket AM3+/AM3 970 ATX AMD
WD 500 GB hard drive
6 GB AMD Entertainment memory
600 WATT Inland Power Supply (Gold Series)