Based on the rules that they fight by, who'd you think would win between a good MMA fighter vs a good kravmaga?

I know that it's always the practitioner and not the style. However, based on the training that they go through and the rules that they fight by, who'd you think would win or have an advantage in a street fight. A good MMA fighter like GSP, who's gonna be use to the MMA rules; vs a master kravmagaist, who's gonna be use to fighting brutally and utilizing the strikes that are outlawed in MMA.