This really doesn't address your issue of solid body vs semi-hollowbody in producing tone. But maybe this article, link below, from Guitar Player magazine on the different effects of wood on tone will prove interesting.
This is a topic I have been studying somewhat seriously lately as I am considering having a Custom Shop Strat built by Fender. I am also very sensitive to weight having had 3 spinal surgeries. I was first considering a swamp ash body as they are the lightest. But I'm not sure Fender will use swamp ash anymore and some guys in a forum started dissing, of course, swamp ash. Of course there was because there is always someone dissing everything in a forum. But there were claims of some swamp ash being a little duller. I want a real Texas bluesy growl.
Anyway, I hope this is some intersting reading: Guitar Player Tonewood Tutorial.
[u]Guitars:[/u] 2014 PRS Santana, 2013 PRS Paul's, 2009 PRS Hollowbody, 1972 Gibson ES-325, 2012 Fender Strat American Standard, 2012 Yamaha Pacifica, Martin M-36, Martin 000-15M, Seagull S6 Classic[br][u]Amps:[/u] Fender Blues Junior III, Boss Eband JS-10, Line 6 POD 500X, Quilter Microblock 45