That doesn't look like a port to me, that looks like someone reconstructed the look from scratch for NWN. There are certain details present on the NWN model that do not exist on the DA:O model, and beyond that, it's shaped differently -- Not distorted mind you, but you can obviously see someone was in a 3D Model rendering program, and decided to take their best shot at imitating the armor, not a direct port. If it was placed on female PC's, it would look exactly as it does on a male model without someone cracking it open to adjust the dimensions to accommodate the dimensions of a female model on PoTM across all races.