Very cordially.
Before we go any further, the "Piedra del Sol" or "Calendario Azteca" is a stone, big and grey (yes, I have seen in myself). No colors. Its on display at the Museo Nacional de AntropologÃ_a es Historia, in Mexico city (and which happens to have an ugly website and so I won't provide an useless link).
Now,
Here is another page with detail of the sun at the center. Important differences with your illustration are discerned quite easily.
While I don't readily discard that there may be a connection between those cultures, I suggest that we walk in solid ground.