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Because Q701 is a very different animal from 702 65th Anniversary. I have both. Q701 is brighter, more forward. 702/65th is better balanced, fuller low end, highs detailed but not strident. But for me the big difference is comfort. 702/65th is much more comfortable on my head -- less clamping in all directions. Not knocking the Q701 -- they are great headphones, vivid and lively, and a bargain these days. But for long-term listening pleasure. I turn to the 702/65th.