Well, I use stands for all my figures, so there's not too much of an issue. But to answer your question the SS Sandie has a better, tighter body then the standard floppy Troopers. The issue is the weight of his pack. Even if you stand him up he will topple at some point... They're just too top heavy for the body. You're going to end up doctoring yours up m8.
As for the second one on the Dewback, he's just a bash. TT Slim... Helmet, shoulder pads, chest armor, upper leg armor, forearm armor and jump suit are all from a Marmit Stromtrooper who yellowed just a touch through the years. I didn't like the way he looked with the rest of my Stormtroopers so I decided to turn him into a Sandie. The feet, lower leg, upper arm, torso/ crotch armor and belt/pouches are all from a SS Sandie through Toy Anxiety... Very well could be parts from a parted out figure that you have parts from too, if you remember that conversation.... The pack and shoulder pad and Dewback proding pole are from Hasbro.
he sits on top of my display cases now.... Love him!!!
Sorry it took me so long to post pics everyone!