Which one is more luxurious? Which one is more sporty. Let’s not say which one is better given the subjective nature of the topic. Let’s just discuss attributes of one vs the other. Go!

Mojave is darker, sportier, more youthful

Iridium is lighter and very attention grabbing so id say it's more luxurious and less sporty looking

Iridium Silver is not available on the C-Class. The option of silvers are Mojave Silver, and Cirrus Silver. Mojave has a sand/beige tint to it, and Cirrus has a light blue tint to it.

Here's photos of each color from the owner's pictures thread (no photos of Mojave in AMG-Line).

As js said, the Mojave Silver is a Sand color, and almost never looks Silver except at Dusk or dark shade when the light hits it a certain way. My friends call it a Champagne color and that is probably the most accurate description. Cirrus is a traditional Silver color that you are used to seeing.

Here’s my 2019 Mercedes C63s Sedan in Mojave Silver Metallic. Bucket seats, Carbon center console, Carbon and Alcantara steering wheel with the dials. Anyone seen a C63s in this exact color? Seems super rare can’t even find one on google.