Stainless stell is not totally non-magnetic.
Magnetism can be induced in it.
This is not an issue that effects its strength or its resistance to corrosion.
Now that being said, one does wonder metalurgically if the wires are the same. Still there is no easy way to check this. A thicker wire will have a larger magnetic probability as it has more surface area.
All in all there is nothing to worry about.