Visual differentiation is nice, but in this case, that is also coupled by functionality. What is a squircle? A combination of a square and a circle.
Here what the C8’s steering wheel looks like. If you want to read as to why GM started half way toward a squircle by having a flat bottomed steering wheel standard on all C7’s, but additionally why they further moved to its flat top on the C8, that’s at the link
Here what the C8’s steering wheel looks like. If you want to read as to why GM started half way toward a squircle by having a flat bottomed steering wheel standard on all C7’s, but additionally why they further moved to its flat top on the C8, that’s at the link