Lots of myths surrounding musical instruments in general, and saxophones/clarinets in particular. Take everything you hear/read with suspicion and decide for yourself as your skill-level progresses.
I've been playing saxophone since 1956 and have a large shoe box filled with various reeds, reed brands, reed cuts, reed strengths, and cane and synthetics. My experience has been that most reeds are inconsistent coming new out of a box. Hence, I adjust them all when they are new. In all those years, I couldn't identify which reed was which cut or brand unless I looked at it first. Once broken in, it doesn't matter to me. Does it play and respond well or does it not? That's all that matters. DAVE