Board Thread:Speculation House/@comment-24278127-20131211040136/@comment-16502426-20131214061317

Blake is undoubtedly the fastest in her attacks, but Ruby launches herself across a field at the deathstalker in no time at all. Then again, Blake seems to be able to run at crazy speeds, and Ruby can practically disappear for short distances.

I think Blakes speed in her attacks is mostly physical, as a result of her extreme agility, and her running speed may be a Faunus thing, also physical.

Ruby's long distance speed seemed to be based on using her weapon, so again physical. However, her short range speed seems to be he semblance, resulting in her disappearing and leaving rose petals.