In Qur’an 10:16 you have the simplest and clearest textual variation, between the Hafs and Qunbul: If Allah had willed, I would not have recited it to you, He would not have made it known to you… (Hafs) vs If Allah had willed, I would not have recited it to you, He would have made it known to you… (Qunbul)