Which is fastest 8500 cl7 or 10600 cl9

I have the option of using PC3-8500 CL7 or PC3-10600 CL9 RAM in my HP dv8t laptop (i7 Q720 @ 1.6 Ghz) running Windows 7 64 bit. Which would be faster?
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  1. 8500 / 8 = 1066 MHz CAS 7
    10600 / 8 = 1333 MHz CAS 9

    To illustrate the 'Slowr/Fast' is data rate and CAS (...) wait time to transmission
    Slowr.......Slowr.......Slower....... 1066 MHz CAS 7
    Fast.........Fast.........Fast......... 1333 MHz CAS 9


    The overall speed is nearly identical. IMO the best choice is either DDR3 1600 MHz CAS 8/9.

    Here's a few good 3x4GB Kits -> http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE&N=100007611%20600006078%20600006127&IsNodeId=1&bop=And&CompareItemList=147|20-226-194^20-226-194-TS%2C20-226-100^20-226-100-TS%2C20-233-146^20-233-146-TS
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