There are a few drawbacks listed on the page I have linked earlier, including cut off frequency, THD, non compliance to A2DP profile, prone to interfere etc. The first comment you quoted questioned just about a difference aspect -- the binary output of the codec. A measurement of identical bit...

I highly doubt the quality of LDAC implemented in bluetooth. Here is a rant of the LDAC by an audio related site. Spoiler: A low efficiency lossy codec that is good for nothing. https://www.soundguys.com/ldac-ultimate-bluetooth-guide-20026/

I'm happy to report that the Sony WF-SP700N support AAC when choosing the quality over connectivity on the app. :ksc75smile: Thanks rshev for the tips on how to find out the codec!:thumbsup: