I completely understand where you are coming from and my previous reply that didn't post was explained better, but I hope this gets my point across the way i intend it too.
I get you are saying that from the factory they come with specific tunes and the fox one being narrower is fairly similar in that regard to a bos in that the bikes that it can be switched between are limited more so where as the CCDB will basically cover almost all ranges of designs without needing re-shiming. But you never get to pick your range with a RC4 so it cannot be considered tuned. Really you receive a base shock with average amount of adjustment. CCDB you receive a base shock with large adjustment. BOS you receive a tuned shock with small adjustment as its all you need.
While I 100% agree with that you are still not getting a tuned shock from CCDB or RC4 only the BOS will give you a tuned shock that is right from the get go the CCDB and RC4 you get a factory tune to suit most bikes.
So in terms of a factory tune than the field is a bit wide spread with CCDB been on one end with this massive range, the Rc4 coming in the middle and then BOS with a small range. But the range of the bos is always right hence tuned when you receive it. no need to re-shim it, where as the Rc4 may need a re-shim.
Using your logic about the RC4 could we not flip that and Using the same logic we could argue that the CCDB is more tuned than a FOX as it doesn't require a re-shim or any internal changes therefore it caters your bike more effectively than a FOX has the potential too. While it is not specific it requires less involved tuning?
So bottom line neither come tuned, they come factory tuned. BOS comes tuned.
Sorry for the repetitive nature of the post.
P.S I love a good argument/debate, even if I end up being wrong on the subject I enjoy making my point and trying to win.
You wont need the extra range of a CCDB, as I have just gone though above in my reply the BOS gives you the range of adjustment you need no more no less. the CCDB gives you a lot of adjustment a little you need a lot you don't, but this allows them to be used and switched between bikes without any hassle of internal changes or re-shims. BOS is a great choice if you have not ridden one you will be amazed at how frictionless it feels, just make sure that the shock has the same tune you need, I think bos have 5 or so different tunes. If you get a wrong tuned shock it will need to be re-tuned by a authorized dealer or BOS themselves.