The Kimber is a very nice revolver with a nice, but odd feeling to me, trigger. More importantly the Kimber is a current production item.
The 686 is a revolver from a storied name from a time when we all look at through rose colored nostalgic glasses that they are not making anymore. (That hole in the side makes a difference if not mechanically, aesthetically and or politically. This makes the 686 the better choice overall IMO unless the choice comes down to PURELY tool for tool.
If this is simply a tool for tool choice. Pick the one you shoot better or addresses your problem better. Carry take the Kimber. Bedside/Jack of all trades take the 686.
Heck took for tool all value and emotion aside.....sell both and get a mid sized piece of tactical Tupperware.
All that said for me personally in that conundrum I still take the 686.