I bought these last autumn but never posted this picture here as I couldn't identify the ones on the left. Today I finally managed.
They are 黑皮鸡枞菌 (hēi pí jī cōng jūn), 'black skin chicken fir mushroom', Oudemansiella raphanipes. Cultivated from Yunnan Province.
They are pleasant enough but very mild in taste, compared to the morels.