Dual cores are very good chips, but obviously quad has double the processors, so therefore, will outperform dual, it's black and white.
I remember having a Q6600, and loved every minute of it, but was covered in darkness by my recently purchased Q9650 ...unreal

Thank ur lucky stars you're not running a Pentium 3 or 4, not offense to anybody that is using one...amazing how far technology has come.