Do radial slicks hook better in the heat than bias?

Was at a race Saturday in 100+ heat where many of us were spinning off the line. Talked to a good racer who said his radial slicks helped him to hook better in the heat. It'll be time to buy new slicks in about 2 months. I've used Hoosier 29.5x12x15 with D06 compound for years. Maybe it's time to try something new? Footbrake car with Dana 60 4.56 w/spool. I leave at 1500 rpm and cut good lights.