The status and knowledge of the Prophet Muhammad ( SAWA) is the greatest above all the Prophets. His Progeny are from him as Allah says in Quran ( A Progeny (of the Prophet) from him and he is from them (3:34).
The knowledge of the Prophet Muhammad is higher than the knowledge of all previous prophets. Since his Progeny inherited and got his knowledge, their knowledge is higher than all human beings except the Prophet Muhammad (SAWA).
Wassalam.