Yes, similar interested but divergent methods. I prefer to avoid any post-processing so that I am able to more definitively pronounce my work free from digital manipulations.
In either case, neither of us is using any sort of simple filter or digital effect to get these unique results.
A programmer friend of mine once remarked that I was pushing digital visual artists to do better since my single-click images were evocative of very complex digital visual art.
Here is my manifesto (which needs rewriting/augmenting):
James, I really value interesting comments, as yours, and comparisons of technique. Yes, you tempted me to do a search on luxagraphia! It is your term but very appropriate to in-camera motion effects, whether multiple exposure or single timed exposure. Every once in a while, when subject motion is pronounced, I am tempted towards multiple exposures. I also like the more (sometimes) controlled effects from deliberate camera movement, rotation, etc. Usually I find it useful to blend in a "stationary" exposure, or enhance the edges in post processing.