Answer:
In principle, if the actual verses of the Qur’aan are more than the commentary, then it is not permissible to hold the Qur’aan without Wudhu.
If the commentary is more than the actual verses of the Qur’aan, then it will be permissible to hold the Qur’aan without Wudhu. In any event, the commentary being more than the actual verses of the Qur’aan or not, it is not permissible to touch the actual words of the Qur’aan. (Tahtaawi vol.1 pg.47; Qadeemi)
Al-Mahmood 18