Uipath Apps vs Action Center

Hi i was trying to figure out what is the difference between the old UiPath Apps of the 2019.10 version and the new Action Center in the 2020 FTS version.

They seam to be the same with different names, i would like to know the improvements done.

Any help is much appreciated!

It underwent a product rename. Between 19.10 and 20.4, we added Generic task APIs (and External task activity) for integration purposes, Assign Task activity for action assignments from the workflow, support for a new action type ‘Document Validation’ for out-of-the-box validation station integration and bunch of forms UI improvements (some control fixes, navigation between actions with previous and next) .