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Sony WH-1000XM4 (2020) vs JBL T450 (2017)
JBL T450BT (2017)

The Sony WH-1000XM4 was loved by reviewers from numerous highly trusted sources that perform in-depth objective testing, including TechGearLab, Tom's Guide, Laptop Mag, CNET, Rtings, and Wirecutter. It did great in their roundups - it was dubbed "Top Pick" by TechGearLab, "Still a popular choice and a great value buy" by Tom's Guide, and "Champion sound paired with excellent ANC" by Laptop Mag. That's high praise coming from sources of such caliber.
As for the JBL T450BT (2017) - Rtings, a source that conducts reliable hands-on testing, has featured it in its JBL T450BT Wireless Headphones Review roundup. However, it didn't make it to any of the top spots.
We also performed a thorough Sony WH-1000XM4 vs. JBL T450BT (2017) review score analysis - it turns out that all of the sources that have tested both Wireless Headphones, including Rtings, preferred the Sony WH-1000XM4 over the JBL T450BT (2017).
Out of all the sources that reviewed them, the Sony WH-1000XM4 turned out to be most loved by musicphotolife.com, which gave it a score of 10, whereas the JBL T450BT (2017) got its highest, 6.3, rating from reviewers at Rtings.
Finally, we compared their average scores to all other Wireless Headphones on the market. We found that the Sony WH-1000XM4 got reviewed considerably better than most of its competitors - it earned an average of 9.0, compared to the 7.3 out of 10 overall rating of other Wireless Headphones - while the JBL T450BT (2017) performed worse than most of its competition, with an average score of 6.3.
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