What different between Windows 7 32-bit with Windows 7 64-bit?

The terms 32-bit and 64-bit refer to the way a computer's processor (also called aCPU), handles information. The 64-bit version of Windows handles large amounts of random access memory (RAM) more effectively than a 32-bit system.

64-bit can handle more data quicker and is often a first choice.

Keep in mind 32-bit and 64-bit require different hardware.