worse Core2Duo will beat and Pentium Processor. The E5200 is a pentium processor which has older technology then Core2Duo.
The 2 are exactly the same except different stock FSB and cache. Te FSB of the pentiums can easily match that of a core 2 duo.
I have a new Intel celeron e3200 overclocked to 3.6 with 1mb cache and it easily out benches a stock e8600 costing lots more.