In terms of Teams core functionalities, there are no differences between the Office 365 subscriptions.
All supported subscription plans are eligible for access to the Teams web client, desktop clients, and mobile apps.
Teams isn't available as a standalone service.
Cloud voice features: For Audio Conferencing, your organization will need to buy and assign an Audio Conferencing license to each user who will be setting up dial-in meetings. For Calling Plans, each user will need a Phone System plus a Domestic or Domestic and International Calling Plan. To learn more, see Microsoft Teams add-on licensing.