hi i am buying a laptop for my first one mostly used for college work and internet browsing some times for games i have narrowed it down to 2 in my price range but not sure which one can anyone help please

im not sure whats the best AMD turion or Sempron
also not sure on battery lifes per a charge will be.
also other things about the laptops would be nice or if anyone can find one for around £400

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thanks in advance