Spider v Wasp

John and I were sitting in our bedroom soon after mid day, when I looked out of the window and noticed a wasp had got tangled in the big spider's web outside the middle bay window. The wasp struggled and struggled, but couldn't get free.

Big fat spider comes out to take a look (usually would have appeared much sooner on a tremble of the web) and hung back a bit. Wasp went on struggling, possibly getting stuck down onto the web a bit more... Spider comes a bit closer and stops again, then advances on wasp, which redoubled its efforts and flew away when the spider was only about an inch from it.

Which left me wondering which would have walked away from the encounter if it had happened. Or would both of them ended up dead from stings?