The Core™ 2 Duo E7500 is faster than the E6600, despite having less L2 cache, in the majority of applications. The benchmark below shows the E6750 being beaten in all benchmarks except WinRAR, clocked 266MHz faster than the E6600. Get the E7500.
You said the 6600 was 3.06GHz with 2MB L2 Cache. This must be the Pentium 6600 and not the E6600. I have that chip, and its a 2.4GHz chip with 4MBs L2 cache. Small differences in cache can be made up by changes in speed. Stock I would think would be rather close. I would get whichever was on a newer process, which I *think* is the 7500. That way when you overclock it it will be faster.
And it shows. I don't want to fling personal insults as its not my style, but your posts are badly constructed and hard to follow. I'm not sure a translating program would help, they aren't always good either.
There are two 6600s. One is the older 2.4GHz 4MB L2 Cache like I have, and the newer 3.06GHz 2MB L2 cache like the op mentioned. Due to the small differences in clock speed and L2 cache, I'd just get whichever has better OCing headroom. And regardless of what you wrote, the 7500 can OC just fine.
When we talk about translating, we are talking about your posts not making sense. Let me show you.
"okay then i'm absolutely understood your talking aobut."
"Okay then, I understand what your talking about."
"actually this link is making absolutely understood "TheVorlon_44" talking about."
Should read as,
"This link helps me understand what "TheVorlon_44 was talking about".
Your posts are very hard to read because either your English is poor, or you are using a bad translating program. If you are trying to use your English, try using a translating website instead. It might help. I don't like to make fun of people who have poor English. But anything you can do to help make your posts more readable is a great idea.
The E6600 isn't the best OCing processor. Its built on the older 65nm process, which limits the OC to 3.4-3.6GHz on air. (3.8 is possible but less common.) The 7500 is built on the 45nm process which hits 4GHz easy. Higher then 4GHz is also possible depending on your setup. The same is true for the "other" 6600. The 7500 is the better CPU seeing as it has only one less MB L2 cache, and should overclock 400-800MHz higher. This extra speed should make up the difference in L2 cahce, if the program in question is sensitive to L2 cache amounts. For some programs it will fit just fine in the 3MBs and will show large gains on the 7500 compared to the E6600.