morning red leader,as far as i know sport cups are what they call a hypersports tyre all weather supposed to be very good,can use them at track days and then you dont need to change tyres if it rains,i wouldnt think it would be good idea to mix them an only fit a pair,i would think you would still get same sort of mileage as they are very similar tyre .if you go to my website click on general info it takes you to various brands tech pages. hope this helps
tyreman
