A comparison of two open source simulator projects : the GNU Simulator and QEMU. They have fundamentally different designs which lead to various trade-offs from speed to ease of use. Both are useful tools in the embedded developer’s toolbox, so it’s good to understand the strengths/weaknesses so they can be leveraged accordingly. Biographie

A long time Gentoo developer and current GNU Sim maintainer, he currently works at Google on the Chrome OS project. In his "free" time, he likes to dabble on various low level/embedded projects.

https://rmll.ubicast.tv/videos/a-tale-of-two-sims__/