They both require skill but they are different 'sports". Drifting is a "spectator sport" akin to figure skating on ice. It clearly requires skill to balance the car going around corners, keep the angle, etc. But in the end its about style not speed. Grip racing is like speed skating. You don't get points for style - just finishing first. You also have to do it with other cars (more than 1) on the track and unless you start in front you have to pass to win. Suggesting it is easy is a bit short sighted.