I only just noticed this, but for the remaster, it looks like they're changing the nanosuit to look more like the Crysis 2 and 3 suit. That's probably why the smaller metallic
Catch the Crysis 3 "Suit Up" Launch Trailer - MP1st
Crysis 3 review: one small step - Polygon
Crysis 3 Nanosuit Modules And Upgrades Locations Guide - SegmentNext
Crysis 3 Nanosuit Cinematic Trailer - YouTube
3D model NANO SUIT - 2 from Crysis 3 VR / AR / low-poly | CGTrader
Crysis 3 Hunter Nanosuit Ops 3Q LR front view by themultiplayer1 on DeviantArt