Hello, I read something that talked about the difference between the two files, is how the device shows up. In one case, the board displays as Khadas Tone. In the other case, it shows up as a generic(unbranded) named XMOS sound device, so makers/developers can brand their own projects. I don’t recall which file does which.
Unfortunately, I have not been able to find where it was discussed. If I locate it, I will post back.
Until I find it, I am not 100% on this.
I see the post I looked for was already posted by @wanthalf , here.
"3.If XMOS’s Flash already has firmware, they can be used to upgrade.**The difference between them is that the 【DFU firmware】 displays 【Khadas Tone Control】 name, while the 【Flash firmware】 does not display our name for ODM consideration.**
Using either file assumes the Tone Board already has a firmware installed as these are updates, not complete firmwares.