Sony WH-1000XM4 Vs. WH-1000XM3: Which one should you buy?

Now that Sony has released the WH-1000XM4, its anticipated sequel to its awesome WH-1000XM3 wireless ANC headphones, only one question remains: What changed?

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Just bought these bad boys. Any advice for new users? - Sony WH-1000XM4 Silver : r/sony

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Best Noise Cancelling Headphones: Sony WH-1000XM4 Review – SheGeeks