Will there be a significant difference in the performance of two shielded
loop antennas (used for receive only) if the only difference between them is
that one is made of copper and the other of aluminum? Does one "shield"
better than the other? By performance I'm looking at depth of null, SN
ratio, or overall gain. Any other comments on choice of material greatly
appreciated.

Thank you.
Al
KA5JGV