For some reason there seems to be minimal overlap between the two communities and that blows my mind.
There seems to be completely different cultures IMO
Quote replies are normal on lemmy, but controversial on mastodon
Full text search is normal on lemmy, but, again, controversial on mastodon.
A significant proportion of lemmy users seem to dislike defederation, or at least view it as a last resort, while it seems to happen at the drop of a hat on mastodon.
At least that’s the impression I’ve got from my limited attempts to use mastodon.