I don't see it. The OS Scotty was shown to be a lot more competent officer all-round, as good as or better than Spock while in command as well as handling the engineering miracles as needed. Or both at the same time, as in "The Apple." The movie character was more a one-dimensional workshop tinkerer than anyone who had regularly commanded a starship in action. And the less said about him in TWOK the better.
I am so thrilled to see someone else agree that Scotty was - as a whole - a better ship commander than Spock. The writers just couldn't figure out Spock in command (with the notable exceptions of TDM and TTW) but they nailed Scott every time he sat in the big chair.