Are you not talking about the Pentium Dual cores (E21xx series) and the C2Ds. If you are then the only difference is that the Pentium Dual cores only have 1MB of L2 Cache. They are built using the same architecture as the C2Ds.
Are you not talking about the Pentium Dual cores (E21xx series) and the C2Ds. If you are then the only difference is that the Pentium Dual cores only have 1MB of L2 Cache. They are built using the same architecture as the C2Ds.