The Galaxy S6 and S6 Edge get the bulk of the changelog. There's the inclusion of video calling, work profiles, and T-Mobile's new "Advanced Messaging"—a text messaging service that shows when others are typing and lets users share photos/videos up to 10MB.
That's not to say that the Note 5 and S6 Edge get nothing. Both receive T-Mobile Video Calling UI updates. These come a week after the feature first launched exclusively on those two devices.
You can browse the changelogs for all four below.