I tried following Singemonkey's tutorial. I found it very hard to find a location where there was NO reflection on the guitars. But anyways...
Here they all are.

Left to right: Smoothtalker SSC2, Morgan OMR, Larrivee LV05
The tops are all spruce (Engelman for the Smoothtalker, Sitka for the other two), but they all have different wood used for back and sides
Indian rosewood on the Morgan
Mahogany for the Larrivee. I'm told it's Honduras mahogany.
And good old local kiaat for the Smoothtalker
The Morgan and the Larry have mahogany necks and ebony fingerboards. The Smoothtalker has a kiaat neck and leadwood fingerboard.
Hmmm... reflections causing hassles with the shots of the Larry and Morgan backs. The Smoothtalker has a very different finish and is immune to such problems.