Two totally different machines. The CL63AMG (your buddy's 09 is equipped with the 6.2 V8 - will go down in history as one of the best engines ever made. Current CL63 is a 5.5L Bi-Turbo) is one of the most comfortable cruisers available.
Originally Posted by rondocap
I think most of It is marketing, amg is just another trim level for the heavy cars. The sportier ones are a little diferente, Like the c63.