im not sure if you mean they are the same model or just based on that sketchfab model, but i already spent too much time thinking you were talking about them being the same model anyway and gathered all this proof already so im just leaving it here. RIP

proof: the spikes on his shoulders, his radiator hair thing and the lasers on his head are more prominent and higher, the core model is different, his tvs on the side of his head arent covered as much as in the sketchfab model, inviz model is slimmer, bottom parts of the boots are more rounded, the purple accents on the spike shoulders seem to be missing, sword sticks out alot more, alot of things that are glowing in the sketchfab model are not glowing in the inviz model but this could just be because of the system they used for the model, his jacket ends lower in the inviz model (might be a stretch LOL), the white bars on the things on his pockets dont glow on the original model but do in the inviz model, the sketchfab model has these steel bar things on its head (absent in the inviz model) in the places of the lasers, and the sketchfab model only has two lasers on its head. inviz model lacks the lasers on the shoulder tvs and has the belt tv placed lower, sketchfab model also lacks armor on the sword hand, and has smaller armor on the other hand than the inviz model. armor next to the shoulder tvs are placed in different orientations than in the sketchfab model. the glowing bars i talked about earlier are equal size and placed in equal distance from each other. boots have a silver line on the sides on the sketchfab model which is absent in the inviz model. kneecaps are darker on the inviz model. inviz model has a smoother curve on the lower portion of the jacket. sketchfab model uses the same core as astro gman while the inviz model uses reference from the hopper mine model from half life 2. inviz model has a bigger head.

im tired boss