They are the same thing rotated, but you’d have to use different chisels for them.
Red circles indicate 6 corners removed (based on the current “8 corners of the cube” system the game currently uses). Blue wedge is the shallow slope
If you remove the same 6 corners with a steep slope chisel, you get a different shape (the green Steep slope wedge)
Sorry for the poor finger drawing btw. Those wedges should go up to 0.5m max height