Mesa 10.4 vs. 10.6-dev With An Intel Core i3 Broadwell NUC

With Mesa 10.5 recently having been branched and Mesa 10.6 now officially under development, I ran some quick comparison benchmarks today to see how the latest Mesa 10.4 stable series is comparing to Mesa 10.6-devel Git for an Intel Core i3 "Broadwell" NUC with HD Graphics 5500...