A:AnswerHi Barry - here are some key differences. The 2nd Gen has an Equalizer in the app, whereas the 1st Gen does not. The 2nd Gen also has a Shortcut button, which can be customized via the app for accessing e.g. Speaker Link, your voice assistant or Spotify Tap. The 1st Gen doesn't have a Shortcut button.
A:AnswerHello Hack, if you have two SoundLink Flex speaker you can use them separately and play different content on each speaker or alternatively group the two speaker to play the same music.
A:AnswerHi there, thank you for your inquiry. The SoundLink Flex 2nd Gen does not have an AUX input, so it cannot be connected via a standard audio cable.
If you're looking for a speaker that supports both Bluetooth and wired connections, we recommend the SoundLink Max. It features an AUX input, allowing you to use an audio cable, and also supports Bluetooth for wireless playback.
Jelyn - Bose Customer Support