[Premium-Rx] Wellbrook loop antenna comparison?

[Ron Ott]

UK/VK Gents --
 
 Would anyone care to compare the Wellbrook ARA100-LN large loop, low noise antenna to the ALA1530 loop? I was intrigues by Enrique's images of the Wellbrook antennas and his comments about the large loop - his was 2m on a side. I'm particularly interested in 500kHz - 7.5MHz (US AM broadcast band through the 40m ham band).  Is Enrique's  2mx2m loop optimum for this frequency range?
 
Thanks, Ron
W6XY