what is the preferred approach to express pure shacl shape inheritance

Question

I have a quick question about the best way to express inheritance between pure shacl shapes.

E.g.

:aShape a sh:nodeShape . :bshape a sh:nodeShape .

Are the following 2 options equivalent, and which one is the reocmmended ?

bShape rdfs:subClassOf aShape; or bShape sh:node aShape ;

The goal is to have bShape inherit the property of aShape.

Thanks