Business Manager is a suite of tools that helps you manage your Facebook business. It includes the Business Manager app, Ads manager, and Pages manager.
Business Suite is a Microsoft software that helps you to manage your business needs. It includes a wide range of features, like real-time insights, analytics, email marketing, and projects that can help you solve many of your challenges.
The Business Suite can be viewed on the desktop at business.facebook.com once you've logged into Facebook. Users of the current Pages Manager App on mobile will be given the option to join Business Suite instead. For both iOS and Android, the software will be accessible as a standalone download.
The features of the business suite will vary depending on the needs of the organization but some popular features include customer relationship management, project management and collaboration.