A method, computer program product, and system for determining release differences is described. A method may comprise determining a first difference, the first difference corresponding to one or more activities that were at least one of: added to a main branch between a first release branch and a second release branch, and removed from the main branch between the first release branch and the second release branch. The method may further comprise determining a second difference, the second difference corresponding to one or more activities that were at least one of: added to the first release branch, and removed from the first release branch. The method may additionally comprise determining a third difference, the third difference corresponding to one or more activities that were at least one of: added to the second release branch, and removed from the second release branch. A delta activity set may be determined.