Asking a question like that is somewhat similar to asking about a bird, Which of his two wings is more important? The answer is obvious.
إِنَّ هذَا ٱلسُّؤَالَ يُشْبِهُ ٱلسُّؤَالَ :‏ أَيٌّ مِنْ جَنَاحَيِ ٱلطَّائِرِ أَهَمُّ ؟‏