Thanks. The eFX is almost identical with the MR LE (limited Edition) but quite different from the MR CE (Collector's Edition):
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Differences in Master Replicas (eFX) Stormtrooper 1:1 helmet
MR/eFX Limited Edition Helmet: (eFX is exactly like this one but just 500 made)
Suggest Retail Price: $399
Version: "Hero"
Edition Size: 2,500 (only 1,048 made by MR and 500 by eFX)
Geometry: Asymmetrical (screen accurate)
Lens: Bubble Lens (Green and Grey)*
Material: Hand Laid Fiberglass
Interior: Fully lined and padded
Plaque: Yes
Stand: Yes
Collector's Edition Helmet:
Suggested Retail Price: $119
Version: "Stunt"
Edition Size: Open Edition
Geometry: Symmetrical (idealized)
Lens: Flat-Green
Material: Injection molded ABS
Interior: PU Foam Pad on Crown
Plaque: No
Stand: No