I have had both mainly for my back and sometimes shoulders/neck.
I simply love Feldenkrais but cannot find a practitioner to do it that is not booked out for months in advance.
It is, unlike physiotherapy, a therapy that I find with just one session, my pain is gone.
This, to me, is miraculous and I have no idea why it actually works, but for me it was brilliant.
Recently I had Bowen therapy due to this lack of practitioners in Feldenkrais, and that was also good but not as good as Feldenkrais .
Bowen is still far better than a physiotherapist, where you have to keep going back for minimal reward. Bowen is also instant relief FOR ME
I had Bowen therapy when I did a really awful twist to my spine somehow. The practitioner here is really brilliant,and for these acute issues(as opposed to the chronic things I deal with daily) I find it extremely beneficial.
I've never used them and had to google what they were. There's no scientific evidence to support Bowen therapy and it's listed on Quackwatch as a questionable treatment, so it might be a waste of money. But I suppose if you use it and feel better, good for you, even if it's a placebo. Sounds like there have at least been trials for Feldenkrais even if they were not conclusive.