See the difference in the links below. (Remember, i5's can be dual core or quad core, and as such, they vary in performance.):
Hope this helps.
I am thinking about getting a new laptop. I see a few that I like, but they have different processors. One has an i3 processor and the other has an i5. I go to the intel site and look up both. They both run about the same speed and have the same amount of threading. So my question is, how should I go about choosing between the two processors? Lets assume that on an average day I will be watching/editing videos, surfing the web, and attending classes online.