If you're on the hunt for some budget friendly headphones that offer great sound, then the Boult Audio Z40 and the OPPO Enco Buds 2 are a great option worth comparing. Both headphones have excellent audio quality with detailed highs and surprisingly deep bass, but they have quite a few differences. For starters, the Boult Audio Z40 are wired headphones, so you have to be connected to your phone via a cable. On the other hand, the OPPO Enco Buds 2 have Bluetooth connectivity, which makes it easier to use them for wireless audio and take advantage of features like hands-free calls or voice assistants. Additionally, OPPO Enco Buds 2 also feature active noise cancellation, which helps block out ambient noise and offers a more immersive listening experience. Boult Audio Z40 have passive noise isolation, which can help muffle outside sound but it won’t completely block it out like active noise cancellation. On the other hand, Boult Audio Z40 are slightly more comfortable than OPPO Enco Buds 2 as they feature larger earcups with more padding. In terms of battery life, OPPO Enco Buds 2 win again at 7 hours compared to 5 hours for Boult Audio Z40. In conclusion, both the Boult Audio Z40 and OPPO Enco Buds 2 are great budget-friendly headphones that offer good sound but have different features. The Boult Audio Z40 are better for people who prefer a wired connection and want something a bit more comfortable, while the OPPO Enco Buds 2 are good for people who want to be able to go wireless and take advantage of active noise cancellation technology and longer battery life.