what’s the different between sequence and matinee？

[Luos (Luos_83)]

obviously.

The list of improvements and new functionalities is huge.
Sequencer Overview | Unreal Engine Documentation

UE4 - Sequencer Basics - YouTube < basics
http://www.gamasutra.com/view/news/268236/Unreal_Engine_4s_new_Sequencer_allows_for_filmstyle_cinematic_workflow.php