I have some questions, hope can get the answers from u all pros...tqtq...^^

1. how to differentiate the qualities of processor? As i see in the market, there are many models of Intel processor, such as Core 2 Duo T6400,T6500,P8600,SU4100..... all also is core 2 duo... =="

2. Dell Inspiron 14, 14z, 15, which one is more better ? budget is rm2400.

thanks.