Getting speed difference between signal comparison using Dynamic Time Warping I understand that Dynamic Time Warping is an algorithm to find a matching between two signals with different length and speed

But is there a possible way to find the speed difference between the two signals being compared?

To clarify my question.
I am working on a project to find similarity between two motions. 
The data being compared is in the form of Quaternion. By using DTW I was able to find the similarity/ dis-similarity between these motion signals, However I would like to know is there a way to find if one motion signal is slower/faster than the other.
Ex: both motions are actually similar, but one of the motion is slower than the other
There is no single "speed difference".  The way DTW works is that it checks whether you can find a match by slowing up and/or speeding up one of the signals.

For instance, suppose you want to match signal X to signal Y, which last 3 minutes.  It's possible that the best match might involve speeding up signal Y for the first minute, slowing it down for the second minute, and leaving its speed unchanged for the third minute.  Thus, there's no one speed, no one speed difference, and no simple answer to whether Y is faster than X or not.  Rather, the answer is: "faster in parts, slower in others".

Once you find the best match using DTW, you can easily recover in which parts Y was faster than X, and in which parts Y was slower than X.  I encourage you to do a bit more reading about how DTW works -- it'll probably all become clear as you understand the gist of the idea.