Essentially, yes! In fact, the most common types of mushroom you find at the store are just stages of maturity from the same species! Each round of crops will produce a different batch. White (button) are the youngest and have the mildest flavor. Cremini (baby bella) are like teenagers, with a little more attitude and flavor. Once these are fully matured, the large cap opens and develops a “meaty” flavor — these are labeled as portobello.