I have owned several Kimbers and Springfields. They were/are standard production types,e.g. Trophy Match, Loaded, Target II, Eclipse, etc. My Springfield Trophy Match went back for a new slide. My springfield loaded had all kinds of problems, which included near non-existant accuracy, unreliable with any factory ammo I tried, barrel feet and slide improperly machined, sharp edges, just generally rough overall. This one, a gunsmith and I corrected, while doing custom work planned for the gun. I have a custom, built on an older standard parkerized Springfield, which is quite nice.
My Kimbers have been much better overall. Cleaner machine work, better fit of barrel-to-slide-to-frame, better finish, excellent accuracy and total reliability, except for one easily correctible problem with one gun. I understand the higher end Springfields like the TRP or Pro are quite nice, but I've never owned any of those.
I still own and shoot both brands. But, given my experience with five Kimbers and three Springfields, unless I were planning on extensive, and expensive, custom work on the Springfield to begin with, I'd have to go with the Kimber...ymmv
BTW, a gunsmith I spoke with recently indicated he doesn't work on many Kimbers because people just buy one with the features they want and don't usually need any additional work...