Amazon echo 4th gen vs Echo dot max

Hi! I have an Echo 4th generation, and a few months ago I bought an Echo Dot Max on sale from Amazon.

I’m thinking about selling one of the two, but I could really use your advice. Which one would you recommend I sell?

I’d really like to keep the one with the better sound quality, but after doing several listening tests, I honestly can’t decide between them. They both sound great to me, and I keep going back and forth.

So, I’d love to hear your opinions and advice. Which one would you keep, and which one would you sell?