If I had to spend time studying the spider or the wasp, I would choose to study the spider. I am deafly scared of spiders, but I am more terrified of wasps. I am fine as long as the spiders or wasps don't touch me or come near me.
I would choose to study the spider because they are harmless to humans (except for a painful bite), and their mild venom is weaker than a typical bee's. Some people keep tarantulas as pets although I don't see why. Tarantulas are slow and deliberate movers and eat mainly insects. The tarantula intrigues me because I think there would be more to learn about a big spider than a tiny wasp.