on the left is an edible cep, and on the right is an inedible bitter bolete.

bile bitter bitterling boletales bolete boletes boletus brown bun cap cep closeup compare comparison confuse confused confusion delicious detail distinguished doubles eat edible edulis false felleus forest fresh fungi fungus gall grow harvest hunting inedible left macro mashroom moss mushroom mushrooming mushrooms mustard nature network nonedible penny porcini porcino reddish reticulation right similar summer two tylopilus white wild wood young