Ive had an ibelink, they dont hash consistently at what they say they do, these could be different, but these are probably as efficient as the d9 when you take that into account, the benefit is the price. Bitmain could still bring out something to undercut this. Could be x11 all over again.
Ibelink Miners hash correctly when cooled
Yes, that is my experience. But having said that, my X11 was very sensitive to needing to stay cool which was a pain. (Unlike my antminers which don't seem to care, I can run them hot as heck.)