2 answers
Hi there,
This table shows the difference between Outlook for Salesforce vs Outlook Integration + EAC. If you just focus on the right hand column, you can see the difference between the two you mention :) https://help.salesforce.com/articleView?id=outlookcrm_sfo_move_compare_features.htm&type=5
As for your type of feature, head to setup > company information. It may tell you there :)