The difference involved with those unique vehicles is that they really aren’t to a certain degree. The RS shares an engine with the mustang and now the ranger. The raptor shares a 3.5 TT with how many MILLIONS of vehicles already on the road or in the future. Not to mention the tuning strategy of the eco boost engines is probably close to same across all of the engines, as is the VW family (R/GTI). The GTR is just a super car so meh. Why not. So yes those ENGINES and factory tuning strategies are outselling ours by many, many times.
I used to tune the EB platform for the first to tune, most accomplished (WR HP, TQ, 1/8,4,2 mile ET) and largest EB tuner out there. The EB cars/trucks are surprisingly different from each other. The FiST and FoST are not even related. The FoST and RS aren't either. They are ~80% identical in every way. The RS and EB S550 are VERY different from the engine block to ECU logic! Even the F-150 and Raptor are not close to being twins, but more like siblings. The only 2 "separate" platforms that are almost twins are the SHO and X-Sport. The company that I worked for has their own proprietary hardware and use software that NOBODY uses...except for one GIANT elliptical international company. That is all of the info that I can share without getting sued LOL.
As for us getting actual handheld ECU flash tuning, a company will have to dev software that will talk to, and get replies from our canbus system...HINT HINT. The OBD port is an AMAZING thing, BUT it takes real know-how to get accomplished what we all want. Just ask any Mopar guy. The company I worked for was the ONLY ECU tuner for the 13+ Mopar guys for years! They tuned the whole lot of the SRT vehicles for years with a flash and handheld tuner when Arrington (aftermarket hand of FCA) needed a whole new ECU. I am positive that there are guys that can talk to the ECU in the CK cars, but getting replies is a whole different world.
The Cobb AP, SCT X4 and/or BDX could all work from a hardware POV, but we need a tuning company that wants to set records to jump in before actual flash software is even a thought. SCT as an actual tuning company has been dead since they lost their founder. He was the one that pushed SCT to where they got. Now they are basically a hardware and software vendor for tuning companies. Cobb is primarily only worried about the JDM and Subie world, because of the numbers. Can't fault them there. They dabble in a few other pools, but they are not going to take on a "project market" like the KDM's.
There are a TON of companies out there that have the tuning capability/skill to tune the CK, like boost controlled performance in Michigan for example, but who knows if they want to tie themselves up in a new market. They would also need the help of the Cobb lead calibrators for the base mapping. I have never seen the logic of our cars, so I do not know how similar (if at all) it is to the Subaru and EVO ECU's.
I know that my old company will not tune the CK. They do ZERO import tuning, PERIOD.
There is a company based in Tennessee that I cannot name, but they do both software and hardware dev internally. The guy at the helm of their tuning, Roger, is a freaking wizard! Figure out the company and ask them. They tune a ton of different makes too!
The best bet in my opinion would be to bother our local Cobb tuners and see if they can force Cobb to dev base mapping and software support for us. There would need to be 2 willing owners (one local to Cobb and one to a Cobb tuning partner) to donate their cars for who knows how long for us to get flash tuning.