Crysis Performance Difference on Vista/XP?

Is there any performance difference when playing on Vista Home Premium 64bit and on Windows XP?

Sorry if this goes in Computer Games section but it just seems like it fits better on this forum.

Only vista can play Very High settings.... SO....

Ill re-phrase the question for him:

Is there any difference, performance wise, between Crysis on Vista running HIGH settings and XP running HIGH settings?

Only vista can play Very High settings.... SO....

Ill re-phrase the question for him:

Is there any difference, performance wise, between Crysis on Vista running HIGH settings and XP running HIGH settings?

RFOMownage

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RAM - http://www.newegg.com/Product/Product.aspx?Item=N82E16820231148

Will the above run Crysis on either High or Very High settings, or am I borked...