There are 3 main mechanical presentations in the athlete. This especially true in sprinting. We have the muscular/concentric athlete, the elastic/isometric critter, and the rhythmic/eccentric beast. These conditions are primarily genetically determined, although they can be influenced to some degree by training.
Concentric athletes emphasize pushing from deep (more flexed) joint angles and are considered to be muscle-dependent or force-gnerators. These are your best starters and accelerators and tend to dominate in the first 30 meters of a 100. They look like running bodybuilders.
Isometric athletes maximize that athletic stiffness and are known as elastic performers. They are very bouncy. These cats transfer force into the ground (and get a big return) more so than create it like the concentric athletes do. These movers tend to come on in the middle of a 100 and are slighly more slender in appearance.
Eccentric athletes tend to start showing up as the distances get longer, but you'll still see a few 200 and a lot of 400 runners using this technique. They don't generate energy or strike as hard as the others, but they are very good at containing it. They use the stretch-shortening cycle of muscle contraction to slingshot or pull themselves along so smoothly. These people shine most as the finish line approaches, because their rate of deceleration is often the least.
You'll definitely see "pure" examples of these mechanotypes at the gym, track, etc. Or maybe even in yourself. But a lot of people are hybrids, either of the first two or the last two. You'll see a concentric-elastic sprinter (or any other sport) as well as an elastic-rhythmic locomotor.
The take home message here is to explore what type you are, and then celebrate it. By increasing awareness of your personal biomechanics, you have a secret weapon for improving performance.