Bing came up with this:
Microsoft 365 Business Basic and Office 365 E1 are two different subscription plans offered by Microsoft. Both plans include web and mobile versions of Microsoft 365 apps, chat, call, meet up to 300 attendees, 1 TB of cloud storage per user, business-class email, standard security and anytime phone and web support^1^.
Some of the main differences between Business Basic and Office 365 E1 are: Business basic only lets you have 300 users whilst E1 lets you have an unlimited number of users. E1 allows you to have more SharePoint collections than Business basic. E1 allows you to create e-discovery cases whilst Business basic does not^2^.
Is there anything specific you would like to know about these plans?
Differences between Microsoft 365 Business Basic and Office 365 E1?
Microsoft 365 license comparison
Difference between Microsoft 365 Apps for business and Microsoft 365 Business Standard
Microsoft Business Licenses Comparison
What is the difference between Microsoft 365 Enterprise and Microsoft 365 Business plans?
Microsoft 365 Enterprise includes advanced and customizable management features for organizations with specific needs. Microsoft 365 Business plans are designed for small businesses, have simplified (i.e., not customizable) management settings, and a user cap of 300 licenses per tenant.
What is the difference between Office 365 and Microsoft 365?
What are the differences between Microsoft 365 and Office 365 licenses?
Microsoft 365 is a comprehensive suite that includes Office 365 along with Enterprise Mobility and Security (EMS) and Windows Enterprise. Office 365, on the other hand, is primarily a productivity suite with core applications like Outlook, Word, Excel, and PowerPoint. We have a blog post with more details here.
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Bing came up with this:
Microsoft 365 Business Basic and Office 365 E1 are two different subscription plans offered by Microsoft. Both plans include web and mobile versions of Microsoft 365 apps, chat, call, meet up to 300 attendees, 1 TB of cloud storage per user, business-class email, standard security and anytime phone and web support^1^.
Some of the main differences between Business Basic and Office 365 E1 are: Business basic only lets you have 300 users whilst E1 lets you have an unlimited number of users. E1 allows you to have more SharePoint collections than Business basic. E1 allows you to create e-discovery cases whilst Business basic does not^2^.
Is there anything specific you would like to know about these plans?
In addition to the above, the Small Business plans do not support live events in Teams. Given live events are basically streaming video, it’s seems likely this could be the functionality included in Microsoft Stream for Office 365 E1.
https://learn.microsoft.com/en-us/microsoftteams/teams-live-events/plan-for-teams-live-events#who-can-attend-create-and-schedule-live-events