After trying 41 different alternatives, I still prefer Windows Double Explorer. It works with all Windows Explorer plug-ins, opens two panels and each panel can have different tabs, as you wish. You can copy, move, delete files between the tabs without problems and use the files you yourself have defined in "Open with…", what means you can opt for 7ZIP or whatever. I have never used Supercopier, so I have no idea about it.
The programme has not been updated since 2010, but it is still the best, at least in Window 7. I have heard about good experience from W8 users, but I have never seen it myself.
Another alternative is Q-Dir [http://www.softwareok.com/?Freeware], almost as good as WDE, but updated.