Which Laptop to buy? AMD dual or AMD quad?

I'm buying a laptop, and as a student I will only use it for browsing the web and microsoft office and watching films etc. I don't need it for anything too heavy like gaming etc. I have my eyes on the Lenovo G505 4GB RAM but I can either buy it with an AMD E1-2100 dual core processor or an AMD A4-5000M Quad Core Processor? There's a difference of £80 in price, I can afford it but would it be a waste? I mean would I use it that much? I just need to know please! And btw the Dual Core comes with 4GB DDR3 RAM whereas the Quad Core comes with 4GB RAM only if that makes a difference? And if you could find any other laptops that you think would suit me? My max price is like £250.

Quad is usually faster then dual

Get the Quad one. It performs faster as compare to Dual core while you are doing multitasking or running heavy programs.

The AMD E1-2100 processor is a very weak CPU designed for use in sub-notebooks (tablets, netbooks, etc… ). The AMD A4-5000M is a CPU designed to run "everyday" workloads like web browsing, word processing and watching videos. It sounds like the A4 would be much better for you.