Sequences are used to initiate multiple touch points, and manage your prospects through a consistent cadence of engagement. Sequences log and display more data around performance, and retain that data per prospect historically.
Bulk compose emails are a single, one-time email that is personalized with variables and delivered to multiple prospects.
NOTE: If you include multiple prospects within a bulk email, prospects will NOT be able to see the other prospects that were included in the bulk compose. Any variables used in the compose window will personalize the content to each individual.