He says this project started in 2009, this is about the same time the AFD and the YJM were coming on the drawing board. Santiago is a busy guy.
Here are some tweaks thus far;
More harmonic feedback over the standard JVM
No reverb, Reverb is removed
Modified the power supply to sound more open and less tight, less gain, more harmonic feedback
Same main transformers
Four Noise Gates (from the 2203KK)
Faster channel Switching down to 10ms
Changed the FX loop from parallel to a series loop
Clean Channel is a 6100 clone, less gain then the standard JVM
Crunch Orange is more "like" a 2203
Crunch Red is "like" the AFD
What I get from that (without putting words into Santiago's mouth) is that he used the AFD to describe this channel sound closest to what it is. I did not come away thinking for a minute that it is the AFD; only for lack of a better description or comparison word he said it "was like the AFD".
Sounds to me that the amp is still being tweaked and Joe is giving feedback to Santiago to work with. It sure sounded like there is still work to do before they have the final prototype for Joe to approve.