What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Core2duo and Dual Core

Core 2 duo and dual core are two brand names from the Intel Corporation. Both are the processors launched in by Intel in between 2006 to 2010.Nowadays they are a little out of fashion because of i3, i5 and i7 Processors. But still they are used by those, who cannot afford the latest processors.