Not that I am afraid to pick sides - but I pick both. I have both of them. They are awesome.
First icture is them as “children” I did not do any tweaking 100 percent child 100 percent wolf morph. The front one is Lycan the back is garoul. I did not do any lighting either (just straight out of defualt Daz Studio.
The second pic is the two blended into one genesis. tweaked the morphs and light to get a look I wanted.
The major differences - Lycan has hair/beard/chest.
Garoul has a tail.
Garoul has a little more of a snout.
Lycan is a little buff for a woman or child…
I don’t think either one has separate heads (at least I couldn’t find it in the couple of minutes that I looked…)