Are some glider designs much safer than others? Or do certain designs put their pilots at risk for certain types of injuries during a crash?

Looking at the Libelle with the bubble canopy it makes me wonder if the glider flipped on you during a bad landing or crash if the pilot would suffer head/ neck injuries?

The dg website Has an interesting article on reinforcing the sides of the cockpit:
http://www.dg-flugzeugbau.de/index.p...oes-not-sell-e

Is there a source for information on this?