Ferrari dealer service departments are at their best when servicing newer models, like less than 10 years old. Anything older than that, dealer expertise and factory support drops off precipitously. In that case, you are much better off going to a reputable independent Ferrari specialist. Many of these shops will be staffed by ex-dealer employees. It's still important to go to a Ferrari specialist, as a general purpose indy mechanic will probably cause issues or do things in an inefficient way.

I’d say it probably applies more since they have more money and probably less specific Ferrari knowledge. Better to trust the experts!

The Ferrari dealership is going to have much more expert mechanics in working on Ferraris that just about any other mechanic you'll find (I'm sure there are exceptions to this, but that's going to be rare).

If you're selling cars $300k+ minimum, you're selling much more than the car. Your dealership is going to be treating you the same way enterprise software companies treat a corporate account (dedicated sales, customer success, etc).