وَخِيَارُ الْمُشْتَرِي لَا يَمْنَعُ خُرُوجَ الْمَبِيعِ مِنْ مِلْكِ الْبَائِعِ، إِلَّا أَنَّ الْمُشْتَرِيَ لَا يَمْلِكُهُ عِنْدَ أَبِي حَنِيفَةَ، وَعِنْدَهُمَا يَمْلِكُهُ
Translation: The buyer’s option does not prevent title from leaving the seller; under Abu Hanifah the buyer does not yet acquire it, whereas under the two disciples the buyer does.
This is a subtle distinction. Under Abu Hanifah, leaving the seller’s ownership and entering the buyer’s ownership need not occur together during the buyer’s option.
The two disciples hold that ownership does enter the buyer, although the buyer retains the right of choice for the agreed period.
Do not collapse these two classical positions into one.