The Shadow Scout (like mine below), is an all black version of the classic white Scout as seen in ROTJ. The Storm Commando has different bicep armor, snout, boots, belt boxes, etc. And, carries different weaponry. Chef may chime in with more history and detail, but as of this date nobody has done a true Storm Commando. I say go for it man, be the first!
http://starwars.wikia.com/wiki/Storm_Commando_armor