The phrase "but rather concerns" is correct and usable in written English.
It is commonly used to introduce a contrasting or clarifying statement. Example: The issue at hand is not about personal preferences, but rather concerns the overall effectiveness of the company's policies.
The mindful person is attuned to the miasma of sensation that has nothing at all to do with one's own subjectivity, but rather concerns the features of the present moment surrounding one's own mind, in its minute detail and its vastness, too.
Most of them were not direct rejections to universal and mandatory preschool policies but rather concerns regarding high-quality issues.
For an anti-Platonist like Poincaré was from 1906 on, intuition is not a mode for representing an object, but rather concerns our capacity to follow a rule.
In other words, this advantage need not be one of physiological or mechanical efficiency or longevity, but rather concerns increasing reproductive potential.
By contrast yet again and finally, the three kinds of modality of a judgment are supposed by Kant to capture the three basic ways in which the copula of a simple 1-place subject-predicate proposition "contributes nothing to the content of the judgment … but rather concerns only the value of the copula in relation to thinking in general" (A74/B99 100).
That legal action, complete with a temporary restraining order, is not about software, but rather concerns the hardest of hardware — a 70-year-old German tank known as the Panzer IV that weighs 27.6 tons.
"It was really not out of ethical concern," Zinner said, but, rather, concern for "our pocketbooks".
Religious objections to vaccines can be powerful, but most (though not all), of such cases points to motivations that are not wholly or even mostly religious, but rather concern other cultural, social, or political factors.
Reports of incorrect treatment to the Swedish National Board of Health and Welfare are seldom made by patients because of over-use of an intervention, but rather concerning shortcomings of interventions.
In this case, the supervisor did not mind that the student wanted to make a major decision, but was rather concerned by the consequences, for the student, supervisor and department, if the analysis was flawed in its methodology.
The steep decrease in stock stems not from a lack of faith in Xerox and their current capabilities, but rather from concerns regarding the strategic overlap of the two companies.
