Yes, this looks pretty much like my version.

Maybe I'm just nit-picky, but I do quite clearly see greenish squares, especially on the forehead and nose area.

Probably not enough to catch my eye, but strong enough that looking at the picture for 5 seconds I would say "boy this was compressed way too much".

You've gotten rid of 78% of the bytes. That's an extremely little price to pay in quality for that kind of gain

Yes it is less than perfect. It looks a lot better than the dithered examples though.