Thread resurrection.
Last week I spent a couple of hours being given a thorough lesson in pianistic performance. Colin, who is our choir's conductor, came round and we played Mozart duets. He is light years ahead of me in sight reading and in some passages I was totally stumped as he played on and I joined in where I could.
I had already mentioned to him some time ago about this gigue, during the tea break at our choir practices, and he was polite but non-committal. He suggested some further reading, which I did, and I have expanded the piece I wrote in 2017 based upon this. However, when I asked him whether he had ever looked at the Mozart gigue he said that he hadn't, but also commented that there are lots of similarities in music where people read things that are not really there into stuff. I'm absolutely certain about the Mozart/Bach link in this, so I sent him the revised piece. After last night's choir practice he pulled me to one side and asked if I had analysed any of the harmonies in the two pieces to compare them. I said that I hadn't, but he said that this really needs further research. It seems that Colin has found similarities that I have overlooked, so I think I have convinced him. I shall go back to the two scores and see if I can find the parallels he is referring to. I don't think I have done any harmonic analysis since my A levels (1972), or possibly my LGSM (1981) so I'll have to get my thinking hat on!
I still haven't found any evidence other references to the link between the two, so I suppose I really could be the first person since the piece was composed to link the two. That's really a rather eery thought.
As it happens, Tchaikowski based the first movement from his "Mozartiana" suite on K574.
https://www.youtube.com/watch?v=RTHBbiq8_RY