The Sprinteur is a rider who specialises in short bursts of speed. Although they do not normally lead the race, in the last kilometre of the race they try to rush past their teammates and competitors to grab victory.
The Sprinteur's model has the letter "S" on the jersey. The Sprinteur's energy cards are marked with the letter "S". The model is the more upright of the two. If it helps, you can think that the "Spinteur is Standing".