It would be helpful to provide the capability to examine two objects within the same database.
I've worked over many years with multiple teams and I observe the same phenomenon. The proliferation of OLD, _BAK, _20191123, _ETC objects as developers try out new things for all sorts database artifacts; Tables, Views, Sprocs, etc. I would find it immensely helpful to compare two such artifacts, TABLE and TABLEOLD (for example) to see what has been changed.
Yossi Geretz shared this idea