The sport and multi-contour seats have thigh extensions, but you can easily tell the difference in the pics below. The 4 seats types are Base, Sport, Multi-Contour, and Ventilated (which has all the Multi-Contour functions).
Base (these are pretty flat, sort of hard to tell in this pic) -
Sport (additional side bolstering, thigh extension - I think manual?, and I believe more adjustability than the base seats) -
Multi-Contour (notice the thigh extension is angled in the corners, whereas the Sport it's not…that's the easiest way to tell them apart. These seats will offer additional adjustability over the Sport seats. The two little round buttons on the side are part of this option. Thigh extension is powered) -
The ventilated seats (not pictured) look just like the Multi-Contour, though if you look closely the material in certain parts of the seat looks slightly different, where the ventilation is. I believe the only 2 colors you could get with ventilation were black and sand/beige. I know for certain you couldn't get it with Cinnamon on the E70.