Is there any flavor difference between portabella and crimini mushrooms? I always believed/heard/read/conjured the flavors were the same. But then, my wife and I went to a new burger place that had sliced portabellas on its mushroom burger, and the flavor was far and away the best and brightest mushroom flavor either one of us had tasted on a burger. This was a beef burger with mushrooms, not a vegetarian mushroom burger. Thanks.