As a recap, Microsoft 365 E3 and E5 (previously SPE E3 and SPE E5) included in the bundle has not changed.
Nothing has changed besides the naming convention. Generally, Microsoft 365 E3 includes
With Microsoft 365 E5
With the new Microsoft 365 Business they have recently announced, it adds a wide range of services for small and midsize businesses.
Microsoft 365 Business includes all the features sets that allows the end users to be productive with the Office applications. Each end users gets the ability to install Office on up to 5 PC’s (Windows or Macs), 5 tables (Windows, IOS, or Android) and 5 smartphones (Windows, IOS, or Android). Allowing the end users to have access to their documents anytime, and anywhere.
Microsoft 365 Business includes solution that allows you to monitor and secure the devices your end users are using to access the content and intellectual properties of your organization. It protects your data, and allows you to remotely wipe devices that have access to your organization's content.
Microsoft 365 simplifies IT, allowing the management of all users and their devices with one single tenant, and one login.