Like I said, running as a simple reverse-proxy, they should be pretty close. The added latency is really the differentiator when going to a single backend, and that's about all you're measuring. You're control itself is still <400rps.

Now add dozens of backend servers, and start throwing a couple orders of magnitude more traffic at it, and the differences will really start to show.

Please note: I'm not saying your numbers aren't useful. Many people will be using a setup like this, and would like to know what the differences would be, if any.