AMD v-series single core vs. AMD Athlon dual core

I'm trying to decide between two different Acer Aspire Notebooks.
One has:
2.20 GHz AMD V Series V120 single-core processor with 512 KB L2 cache and 1066 MHz front-side bus
250 GB SATA hard drive (5400 RPM)
3 GB of installed DDR3 RAM (1066 MHz; expandable to 8 GB)
ATI Radeon HD 4250 graphics (with 256 MB of discrete video memory) It provides up to 1919 MB of total shared system memory

The other has:
AMD Athlon II X2 dual-core P320 processor
2.10GHz, 1066MHz Front Side Bus, 1MB L2 Cache
2GB DDR3 system memory
250GB SATA hard drive
ATI Radeon HD 4250 graphics with 256MB of dedicated system memory

Which would be better for simple computing, surfing, and streaming videos?

IMO the dual core, but it obviously takes more power, though you don't mention battery life or portability.

Thanks! As someone with pretty limited knowledge, that's what my gut instinct was telling me. I usually just use my current laptop in the office and at home so battery life really isn't an issue.

I also wasn't sure how the difference of a GB of DDR3 memory would affect the speed and functioning of the dual core compared to the single core. Can anyone tell me how that would affect it? Thanks again for your help!

IMO the dual core is way more useful than an extra GB of ram if you already have 2GB.

Thanks again for your help!