I heard that too. I believe what Emin meant by no mining is no conventional mining i.e. "brute-force solve a difficult puzzle", it needs far less energy to "interview 5 nodes".
Apparently PoW should still be in there. Something was "missing in translation" here...
I think they're 2 different things though, Emin is building a new coin from the ground up just using Avalanche, Chris is using avalanche for preconsensus on bch