"rather superior" is a correct and usable phrase in written English.
You can use it to indicate someone or something that is significantly better than average. For example, "He had a rather superior command of the English language."
This can be attractive - not least to Guardian types - but also rather superior and twee.
She had made herself, for her parents' amusement, into a rather superior, invulnerable observer.
And Leicester's goal difference is rather superior to Birmingham City's in 2011.
The employees are all very cold, never have a word to say, and behave in a rather superior manner.
I feel Bon Jovi have received a bad rap from people with who believe themselves to have rather superior musical tastes.
Not a common affair, but something rather superior, something secure — and safe!" So in 1947 Margo Durrell, following the advice of Aunt Patience, did just that.
They prefer to nurse their resentment with superstition, and they would rather feel superior than win.
He is sympathetic, analytical and adaptive rather than superior, doctrinaire and inflexible.
Thankfully perhaps for Burley, Cruyff regards this Dutch team as "different" rather than superior to the one which trounced Scotland 6-0 in Amsterdam six years ago.
Martin argues that this process of consideration and synthesis (rather than superior strategy or faultless execution) is the hallmark of exceptional businesses and the people who run them.
The dominance was credited to his superb coaching, rather than superior personnel, with Maurice Jones-Drew, one of the few N.F.L. stars the school produced, often singing his former coach's praises.
