Terracotta ... Matte or Bronze ?

Both of them are necessary and useful for different reasons.

It is useful to contour your features using a matte terracotta. It will keep the result more stable on the points you choose to contour. The light that will hit your face, if the product contains pearl, may distort the shape you want to create.

Also matte effect looks more natural in daylight. You can add shine on specific parts only after you're done with your contouring.

If you want you can use it as a simple compact powder , in case you wish to give a slightly darker tone to your skin.

On the contrary, you can give a glow and a sun-burnt look with bronze terracotta or show off your tan on a summer night out.

Use all over your face or on specific parts depending on the result you desire!