The components in ExtAngular and Ext JS are equivalent. If you’re already developing Ext JS applications and you have no plans to do any Angular development, then you can continue using Ext JS. If you’re an existing Ext JS customer and are planning to develop both Ext JS and Angular apps, then you may want to consider upgrading to the Ext JS Enterprise license which includes access to Ext JS, ExtAngular and Sencha Test. You can also purchase ExtAngular licenses directly here. If you have a team that is only focused on building Angular apps, then ExtAngular is a great way to leverage their Angular knowledge and harness the power of Sencha’s comprehensive set of components.