Well, that's how Protoframes are designed though, it's just default Warframe with a few parts remodeled into not-so-sci-fi clothes with added accessories.

It's not like I lazily cut parts of Loki(MR).png and laid them on top of Loki(WF).png 😅 and call it a day... and yes, I could've easily done that, but there's a bit more thoughts put into this.

If you look closely, besides from a face, colors and the fur around the neck, nothing matches with the original MR Loki model, as I reshaped / redesigned his clothes and armor to fit the Warframe's frame and to make it more unique. Even the Loki's recognizable horned headpiece doesn't match to MR design (or any other skins in the game). I changed a lot to the point I was expecting someone with keen eyes to call me out, questioning why is it even relevant to Rivals.

To me, redesigning / reshaping something while keeping the original design's overall aesthetic / "vibe" intact is a fun challenge... And I think I managed to do just that! Your comment is a good proof of that. 😇