Interesting comparison (anecdote): I posted the same post on Twitter and Mastodon, I have 4 times as many followers on Twitter compared to Mastodon. But I got double the engagement on that tweet (which really needed engagement) on Mastodon compared to Twitter.
https://twitter.com/jeena/status/1379417800662392837
https://toot.jeena.net/@jeena/106018499028020816