In an Essay I wrote:
费先生关于「焉有稼」所说的仿佛有道理。这样的观念让上者成为了「五谷不分」的人。但他关于孟夫子写的略有偏见
My teacher corrected the second (bold) 关于 to 对。 Is this presumably to avoid repetition, or are there subtleties creating a preference, when used in conjunction with different verbs?