i3 M versus i5 M

This is very old news. You don't belong here. Go away.


"The price difference may not reflect in the performance."
This all the good things you can get from the morons on the Internet around this time about the above topic:

To put it fair and square, here is the comparison from the manufacturer site between:

Intel® Core™ i5-450M - Arrandale
Intel® Core™ i5-2540M - SandyBridge
Intel® Core™ i3-370M   - Arrandale
Intel® Core™ i3-2310M - SandyBridge


http://ark.intel.com/Compare.aspx?ids=49022,50072,49020,52220

The difference between the laptops using them can amount to 500 Euros, depending on the features of the laptop: RAM, storage(this is a form of memory too), screen size, discrete GPU, etc but the processor characteristics remain largely the same from the laptop user view.