EVGA also has higher base clocks. I would like to see them at identical clocks to be sure. Although eVGA only has an Nvidia reference cooler and MSI already has their own solution. I have not seen any MSI reviews but the eVGA was the best overclocker of any card without voltage control in several reviews I have read.
The EVGA has a slight advantage on OC. Ive seen sites get it up near 850 on stock voltage. On my MSI i need a slight increase to voltage but on stock I can hit 825. Both numbers are far higher then the 675 stock setting. You do pay more for it on heat and noise on the EVGA.
I've owned EVGA cards before, they are fine.
I've had XFX card with Zalman HSF
Asus cards with Glaciator HSF
MSI with Twin Frozr HSF
and reference HSF from many others
the cyclone is easily the best HSF I have owned on a card in both lack of noise and cooling.