1, color: real crimini mushrooms will slowly change color when soaked in water, and the color will not be even when dispersed, while the fake crimini mushrooms will quickly lose their color after being exposed to water and the color dispersed in the water is especially even.

2. Stem: The stem of real wild crimini mushrooms is solid and has small holes, while the stem of fake crimini mushrooms is hollow and has no small holes.

3, smell: The real natural wild crimini mushrooms have natural aroma, not pungent, while the fake crimini mushrooms do not have natural aroma, and some of them also have a kind of pungent odor.

The above references? Baidu Encyclopedia - Red Mushroom