I dont have a real Hardy at the moment but I do have a pre I can drop in any opamp and trannie that I want and I do have a 990c op-amp as well as a Jensen 110 trannie, so in essence a Hardy M1 though I think theres another stage in his stuff.
I liked the old mic better. The older mic has a smoothness that I didnt hear in the newer mic. However they both had that Neumann thing going on that most other mics simply dont exhibit. I did like the Ai on the acoustic guitar just a touch better. But here, when I'm doing a keeper acoustic track, I'll put my U87 right about where they had theirs and I'll add an SDC below the upper bout and angle it according to how much soundhole I'm looking for in the guitar sound. So, for me, the older mic, which had the better low end response is perfect my set up as I'm getting more of the high end from another mic on acoustic.