thrilling comparisons in roller coasters in minecraft

I've seen some minecraft roller coasters in minecraft but they all have one thing in common. all have the same way of speeding up. now i do a thrilling comparison on some new versions from the slowest and the most boring to the fastest that i've built. check it out because the fastest shows first and sets the stage before i start showing the contenders. fyi all roller coasters had looping rails to speed the roller coasters up.