Differences, Turbo Boost and AES which are both absent on the i3.
Just no one know what AES is, it is an encryption instruction set which enable fast and secure data encryption and decryption. AES stands for Advanced Encryption Standard. It is very useful if you encrypt the data on your hard drive using AES encryption.
The AES instruction set basically allows for hardware accelerated encryption and decryption, therefore it is much faster than using software alone. If you do not encrypt the data on your hard drive then AES is not really necessary.
AES is also used in the WPA2 protocol in wireless modems/routers to encrypt / decrypt data packets. However, AES does not affect the speed at which data is transmitted / received.