There is no difference, Slack itself tied up with AWS to use chime for their own voice/video calling [1] [1] https://www.theverge.com/2020/6/4/21280829/slack-a

There is no difference, Slack itself tied up with AWS to use chime for their own voice/video calling [1] [1] https://www.theverge.com/2020/6/4/21280829/slack-amazon-aws-partnership-amazon-chime-voice-video-calls https://www.theverge.com/2020/6/4/21280829/slack-amazon-aws-...