What is the difference between core2duo&dul core?

What is the difference between core2duo&dul core?

A Core 2 Duo, is a Dual Core Processor. However, adjectives Dual Core Processors are not Core 2 Duo. Pentium D, is also a Dual Core Processor. All new processors, are pretty much dual core, presently. http://www.investmental.com
nothing...sorry
Nothing much, except for the brand entitle
there is no diff. contained by the 2 ,both are same.
It is not exactlly the same Core2duo & dul core .. 1st intel introdused dul core pross. do to some modification within that after few months they modified the problem and re- introduced it as core2duo ...that's it.