Question

in what respect as a wire carrying current differ from the a wire carrying no current

Answer 1

wire carrying have magnetic fields around it
where as
a wire carrying no current have no magnetic fields around it

Answer 2

In what respect as a wire carrying current differ from the a wire carrying no current?

A current carrying wire will produce a deflection in needle as it poses a magnetic field.

Whereas, no current carrying wire will not produce any deflection in needle as it do not poses magnetic field.