I have used both, and they worked. One side-effect of SJW is that it enhances the sedative effects of other herbs, including valerian, chamomile, etc. When I first started taking SJW, I had been struggling with insomnia for some time too, and had used valerian and other herbs before. On SJW too, valerian was powerful and knocked me out fast, even if I took just a little bit when I didn't really want to sleep. After a couple of years I think I did build a bit of a tolerance though.

SJW also has other side-effects such as light sensitivity and interference with birth control, so you shoulc be aware of those too.