You narrowed down to RS and AM which are two completely different suits in every aspect.
RS movie accurate more expensive thin plastic = more fragile for trooping made for slender troopers
AM not movie accurate less expensive thicker plastic = solid for trooping but less comfortable designed to fit larger troopers
RS and most suits that have movie lineage are pretty narrow at waist unless you wear approx 34" pants, AM is better suited if your on the heavier side but not movie accurate so all depends whats your priority, the main problem with movie lineage suits are the waist and thigh sizes and the reason I extended AB/Kidney molds on my AP kits so it can fit up to 41 pants size, I basically added 3" extention on AB and kidney plates so you can trim them down to your exact waist size without the need of adding shims. Also most people have a misconception, the thicker the plastic is not necessarily more durable actually more prone to crack since there's less flex making parts too rigid, heavier and less comfortable to wear , you want the parts to flex when you move around (thicker = less flex) and also softer details when forming, too thin is not good either you want the best of both worlds accuracy/durability!
Mark (AP)