Meta sets a 500-character limit for Threads; unverified Twitter users get 280 characters.
Threads needs an Instagram account; users can import bio and followers.
Threads allows five-minute videos; Twitter limits non-verified users to two minutes and 20 seconds.
Twitter's homepage has trends and recommendations; exploring Threads is limited to the home feed.
Threads lacks a post-draft feature, unlike Twitter.
Threads doesn't have a tab for viewing other profiles' likes, unlike Twitter.
Threads follows Instagram's content rules; offers controls for muting and blocking.