I can't decide which one is better this laptop or this desktop

[aztec34]

http://www.cnet.com/products/acer-aspire-7741g-6426-17-3-core-i5-480m-windows-7-home-premium-64-bit-4-gb-ram-640-gb-hdd/specs/
Or
This has 8gb ram installed already
http://support.hp.com/us-en/document/c01959720

Which one is better to handle multi tasking, streaming videos, and do some light gaming like Minecraft or Cs:Go?

 

[HEXiT]

the laptop is the stronger of the 2. by some margin.