Phill Dresser's thoughts:
I was impressed with the overall tonal range of AZO but did notice that the tonality was different to the MG. The colouration varied tremendously with the MG being more silver and the AZO having a much warmer base (I struggled with this initially finding it almost discoloured but warmed to it after a while. I was very surprised by this colouration as I always thought that AZO was cold. Images I have seen on the web (Michael A Smith etc )had always seemed more silver based.
AZO seemed to have a more linear tonal representation where the MG was contrastier or had bigger steps between relevant tones.(Am I making sense here)
I thought that the depth was not comparable between the 2 papers with the AZO easily surpassing the MG, but I think the mid tones are represented very differently where the AZO was much smoother. Highlights are, in my opinion, much better in AZO.
My dislikes were the single weight of the paper. Why do the make this as a single weight? Maybe the print would feel better if mounted but I had strong reservations about the weight.
Generally I could see differences in the two papers but the gulf between them was not as big as I was led to believe.
Was I disappointed with AZO? No way! But I do feel that it might not be a paper for all purposes or styles. (That might be a bit presumptious at this point with my limited experience)