Use the Merge from URL command to merge changes between two arbitrary URLs to the selected file/directory.
Profile 1, corresponding Path 1 and Revision 1 define the first merge source. Profile 2, corresponding Path 2 and Revision 2 define the second merge source. The difference between first and second merge source (the order of the sources is important) will be merged to the local working copy.
For details regarding the options, refer to Merge.