Sub vs subsequent

[piper]

I thought I was buying a Subsequent 37 but it’s actually a sub 37. Are there functional differences between them? I’ve seen the Moog video on the sonic differences.

[Quatschmacher]

Subsequent has a different keybed and improved headphone amp. From what I remember from reading both manuals, the functionality is the same. (The gain staging is different as outlined in the video on sonic differences).