i dont doubt the MODIFIED sprinters would be capable - ie ones with better brakes and suspension , upgraded and or force fed motors - etc etc, but your standard run of the mill 4ag swap - i dont think so
build somethng like improved86's for example - and it will flog a gt4 day in day out but basic gt4 Vs say basic 4ag sprinter - theres no bias about it .But hey - its the guys choice - i know whats better bang for bucks in the end in my blinkered oppinion