There are a lot of places here where you'll see something along the lines of "swinging exposes cracks in our relationships and in our inner selves." I think the situation here may be one of the latter sorts of cracks. You say you're competitive and it appears you've decided your wife's playmate for the night was better, which - if I understand the rules of competition - means you lost. (Btw, I don't think so, nobody else who has reponded thinks so, but I do suspect that you do) That has to suck for you, but the thing is that it's just the voices in your own head talking and has nothing whatsoever to do with what actually happened.
I think every woman who posts here who is happy with her partner will tell you that sex with him is always going to be better than it is with any playmate. No matter how skillful, no matter how many orgasms we have, no matter how prolonged the experience with a playmate, our partners are our home and nobody else compares.