https://en.wikipedia.beta.wmflabs.org/w/index.php?title=Spain&type=revision&diff=400071&oldid=397846&diffmode=source&useskin=minerva looks very different from https://en.m.wikipedia.beta.wmflabs.org/wiki/Special:MobileDiff/400071
Let's converge these pages and styles (when running in mobile mode) so that Special:MobileDiff is no longer needed and thus can be removed.