Sennheiser HDB 630 and Sony WH 1000XM6 sit in the same part of the headphone world. Both are wireless, both have noise cancellation and both promise long battery life with app control. On paper they look very close. The real difference shows in daily use and in the kind of listener that suits each. Sony WH 1000XM6 feels like the easy choice for everyday life. It is light, folds into a small case and slips into a pocket without taking up much space. The headband and ear cups feel familiar if you’ve used the older 1000X models. You can wear it through office hours, long flights or a day of calls and it mostly disappears on your head. Sennheiser HDB 630 feels more like home audio equipment that you put on and stay with for a while. The ear cups are larger and the padding is thicker. The headband feels wider and more padded. On the head, it creates a soft, calm fit that works well at a desk or on an airplane. The trade-off is that it looks and feels bigger and takes up more room in a backpack. Noise cancellation is an area where Sony still feels ahead. The WH 1000XM6 handles low hum from aircraft, traffic and office air conditioners very well. The app adds little touches like changing sound modes based on your location and lowering the volume when you start talking. These small details make life easier when you move between metro, office and home in one day. HDB 630 also has active noise cancellation. It cuts outside noise well enough for flights and open offices. It feels a little more careful with how it touches the sound. You still hear your music in a natural way instead of feeling like everything is being pushed. Both headphones offer transparency modes so you can hear announcements or quick chats without taking them off. Sound is where the two start targeting different people. HDB 630 leans towards a cleaner and more neutral tone. Bass remains tight rather than heavy. Vocals sit clearly in the middle and the top end feels clear without sharp turns. The app gives you deeper control over equalizer settings, so you can shape the sound if you like to tweak things. Sony WH 1000XM6 brings a warmer and fuller sound. There’s more weight in the low end and it works well for pop, hip-hop and mixed-stream playlists. Mids and detail have improved over older Sony models, but the overall feel is still relaxed and friendly. This is the kind of sound that many people will love right out of the box. Battery life is another place where Sennheiser excels. HDB 630 is made for long listening with noise cancellation on. For many people, it will be a few busy days before they even think about charging. Sony WH 1000XM6 still last long enough for travel and work weeks, just not as long as the Sennheiser. In return, you get smoother app features, clear call quality, and easier switching between phone and laptop. So the choice is less about which one is better and more about which one suits your day. Sony WH 1000XM6 makes sense if you want one pair that can handle travel, office work, calls and daily music with almost no effort. Sennheiser HDB 630 suits someone who cares more about sound quality and long battery life and doesn’t mind a slightly larger fit on the head.