Continue glazing with watercolor on both mangoes.
It took more than one glaze of the red to achieve the mango color.
Glazing with watercolor takes multiple layers.
The viewer's eye sees down thru the multiple transparent layers.
Add more glazes of yellow to intensify the color.
Continue to use the warm yellow on the top mango.
The cool yellow on the bottom mango will set it behind the top mango.
Continue glazing until you are satisfied with their color.