The JConcepts wing is much more durable because of it only has holes through the wing; no long slats. So there's alot more material and no sharp corners, which is where cracks are more likely to develop. It makes the whole thing more durable.
When I was first learning, I went through about a wing every weekend from landing on the wing. Bought a JC wing and managed to go the rest of the season on that same wing.
My preference now are the Losi wings, but they aren't even close to what you might call "durable".