I think a lot of people are missing the point of this costume. The article states that the dev team wanted to create the most authentic Nez Pierce warrior they could with this new costume, even more so than his default design. Any similarities to KI1 Thunder are purely coincidental.
How do we know they aren’t making it like KI1 Thunder? Because they specifically said that they would never do that. Flat out. No ifs, ands, or buts.