This topic has been discussed before a while back - it might be a useful reference
(
LINK)
Anyway, my experience: The DEX210 wing bends quite quickly: it's very thin at about 0.75mm around the mounts and 0.5mm at the gurney and side dams. However, they don't tear quickly, especially considering how thin it is.
The LMR ones are nice, they have a very solid base around the mounts (1.5mm) - however, at the edges (gurney, side dams) it's only 0.75mm thick. As a result the base keeps it's shape very well, but the gurney bends first (and does so quite soon). At the corners between side dams and gurney it tears soon too. However, both LMR wings I've had tore quite cleanly (straight), and once that happened they kept on going for a very long time.
The RudeBits R1 wing has the same thickness at it's base (1.5mm), but the gurney and side dams are 1mm thick. It's a really rigid piece. I've yet to put mine in use, but I have high hopes for it.