Notebook Advice

I'm buying a new notebook and I've narrowed it down to pretty much two options:

Acer Aspire 5738G 15,6"
575€
Intel Core 2 Duo T6600 (2.2 GHz)
ATI Radeon HD 4570 512MB
4 GB DDR3 RAM
500GB SATA

Acer Aspire Timeline 5810T 15,6"
589€
Intel Core2 Solo SU3500 1,30 GHz
Intel GMA 4500MHD
4GB (2x2GB), DDR3, 1066MHz
320GB SATA

Now I know in terms of power there is a more than clear winner, but I'm not looking for a powerhouse, got a desktop for that. I'm looking for a portable notebook, so the battery life of the timeline series seems nice. I'm gonna be using it for browsing, text writing and some simple photoshop. Now the question for me is how fast/slow is the 5810 and weather it's worth the money for it's battery life. Any advice would be appreciated.