The profile card in Chat is wider. The person's name is its heading, with their role and handle each on a line under it, then Message, their email and local time, and two rows: Mute notifications, a switch that shows whether they are muted, and Block, a button that asks before blocking and becomes Unblock afterwards. These are the same rows a direct message's Conversation details shows.
A larger profile card in Chat, with a switch for notifications
The profile card in Chat is wider, puts a person's role and handle on their own lines, and shows Mute notifications as a switch and Block as a button.