You would need to own or spend a bit of time as well as completely tear down several production guns of many makers to begin to see differences. One would also need to understand the internals, how they interact and look at how each maker fits or does not fit these parts.
Kimber is much like the truck analogy. Chevy made the Custom, Cheyenne, Scottsdale and Silverado. Basically same truck but each had different trim, comfort packages. In my experience the only internal parts differences in the Kimbers is that some have stainless steel barrels and others do not. And one of the 5" models has a bull barrel.
They have two triggers that look different externally but do nothing differently. The sears, disconnectors pins etc are the same. They have a couple different hammers (compare the Super Carry profile to the others).
Fitment inside does not appear different at all and trigger pull weight and feel is consistent across the lineup.
Overall, you are paying for appearance. Beveled slide bottoms, flat top, undercut trigger guards, checkering etc etc.
Some don't like the Swartz safety and few models exclude it. I could live without it for sure but it is not a deal breaker.
Want to make a closer apples to apples comparison? Price a Springfield loaded model. Got to the SA custom shop price list and start adding the prices for the aesthetic features on the Kimber model of you choice. Do t forget to add the carry bevel package because Kimbers attention to this and interior finish being void of tool marks is far ahead.
Kimber makes all parts in their guns with possible exception of the barrels of at least the barrel blanks (unconfirmed). Unlike others this does enable greater dimensional control which minimizes a lot of hand fitting. Here is where the "dreaded" MIM debate comes in. But let's do that later.
Frankly the stAinless TLE is probably the best buy in the line. You can add the ambi safety later for 60 bucks from kimber with a 95% chance it will drop in if you know what you doing and how it should fit. The mainspring housing mag well is easily added and it already has light front strap checkering and night sights.
The only kimber I have not have in my hand or taken apart is the Super Match. Externally it is nothing special. The accuracy guarantee means it just got a little extra attention to barrel fit. As much as I like Kimbers, it is not worth it as I would have a new barrel and bushing installed on the 5" model of your choice and get that accuracy.