Whats The Difference ? between i5 cpu

[TheHitMan-1973]

Whats the difference between both Processors ? if any

Intel® Core™ i5-480M - 2.66hz, 4Threads, 3MB cache
Intel® Core™ i5-560M - 2.66hz, 4Threads, 3MB cache

Also what does 4Threads mean ?

 

[RJC]

Each cpu has 2 cores with Hyperthreading making 4 Threads in total.

Links below shows the specs of the cpu's the second one has a higher Turbo Boost.
http://ark.intel.com/Product.aspx?id=52952

http://ark.intel.com/Product.aspx?id=49653

Edit: look in advance features