User blog comment:Commisar Wadders/Idea's???/@comment-24305851-20131231114645/@comment-5112067-20131231230535

Its not rivalry, its roles. The SM's role are special forces troops that win small tactical objectives, the IG are used to win wars and take entire systems for the Imperium of Man. Did Commander Solar Macharaius use SM? No, he used IG, and he kicked ass.