Just a little something i noticed when looking at some really big Mario Party Star Rush renders:
The Mario Bros. and Wario Bros. hats are made out of completely different materials. While the Mario and Luigi have the embroidered emblems with sewn on borders, Wario and Waluigi have these felt-like patches, and it appears to be glued on instead as there is no stitches and the fabric is slightly raised.
The even stranger detail is that their hats are a different texture to the Mario Bros. With their caps being a fuzzy material, while the original hats are made out of a more a cotton twill. Over all the Wario Bros. hats feel cheap and newer, which is very suiting. Here is Luigi’s and Waluigi’s for comparison: