Sideshow's Stormtrooper Blaster, the E-11 BlasTech Standard Imperial Sidearm with 3-position foldable stock is extremely detailed and nicely done with some weathering paintwork as well compared to Marmit's molded plastic piece which looks rather small in the trooper's hands.
Marmit's holster is also just one molded piece of plastic compared with Sideshow's Imperial Stormtrooper holster which is made of a leather-like material with restraining strap and magnetic tab. Because Sideshow opted for hard plastic, the details of the Stormtrooper armor are more defined and obvious versus Marmit's which was molded with soft plastic and hence pales in comparison.
The energy sinks on the Stormtrooper armor have always been quite tricky to reproduce in 1/6 scale but Sideshow was able to execute this very well. Marmit's boots are also molded together with the lower leg armor, thus compromising on the poseability. No such problems with Sideshow's Stormtrooper. Only problem with Sideshow's is the loose jointed body. My verdict: Sideshow Imperial Stormtrooper beats Marmit Stormtrooper in all areas.
And now comparison pictures of Sideshow's Imperial Stormtrooper (on the left) with Medicom's Stormtrooper (on the right). The forehead/top of Medicom's Stormtrooper helmet seems to be a bit too high compared with Sideshow's which is rounded nicely. Most notable is the difference in overall size of the figure which is the bane of all Medicom's Star Wars figures. Although the chest plate armor is not as wide as Sideshow's, Medicom's Stormtrooper looks really skinny (not Lindsay Lohan's skeletal skinny but for an armored trooper, he looks malnourished). In this instance, the chest plate armor is TOO TIGHT. You can see from the picture how short his legs are next to Sideshow's.
Medicom's Stormtrooper armor is too tight on the figure overall, causing the exposed body suit to bunch up at the joints i.e. elbow areas. Plus because Medicom's Stormtrooper body suit/glove is made of a rubbery material, fear of the suit disintegrating over time is highly likely :( This will not happen with Sideshow's Stormtrooper.
The height difference between Medicom's Star Wars Stormtrooper figure with other 1/6 scale 12-inch figures is very apparent and shows why I've sworn off Medicom's Star Wars armored figures.
The verdict is IN - Sideshow's 1/6 scale 12-inch Star Wars Galactic Empire Imperial Stormtrooper is the best by far. Now they just have to improve on the body they use - tighter joints please.