Canopy - What are the minimum dimension experiences?

Canopy in exposed concrete or masonry with Schöck elements and roofing work?
Both should be the same pricewise.

Does anyone know pros and cons?
?

We have masonry with Schöck Isokorb, zinc sheet on the edge and downpipe on the side, all plastered and painted gray. If you choose exposed concrete, then you still need a rainwater drainage, basically nothing changes, right? Should the construction then be different?

Best regards
Sabine