The tab pages can be split into 2 type
1.Information only but show status of items
2.Editable on destination SSRS server these are broken out into 2 type
These have a single Source and Destination column. The destination has a combobox (idetified with a down arrow on the right hand side)
eg. Rendering Extensions:
These have multiple columns in the grid under Source and Destination header. To help identify source/destination differences, the destination background column color turns red.