I don't see why "they're effectively the same, but I chose X and have been using it for Z years now, and I'm widely considered an expert" would be any different from...I don't know, denying that they're the same.
If anything, denying it would be evidence of ignorance, no?
Well, except that saying that X and Y are effectively the same is not a great method of getting booked to speak at conferences about X and write articles for sites dedicated to Y. It's the truth, of course, but if your main goals are self-promotion and/or demonstrating how smart you are, it's not going to help you much.