Urgent Opinion Needed

[Jehu]

I just removed the first plug and see its a Bosch Platinum 2 and i bought the regular single electrode type. I wanted to ask what others would do. Go ahead and install the OE plugs i have or put this plug back in and go exchange them for the Supers. Not concerned about money just weather the single tabs will lose me anything like gass mileage. Is the idea of the two prong design less chance of ignition failure? Also how does the old plug look? Kind of seems to have a whiteish tan grey crust I'm off to chek that plug site. Answer asap if you can we have rain forecast to begin in a few hours and i'd like to get 'er done before that. Thanks.