So Catholicism had made significant strides from the 15th (baptism of Kongo's King) to the 17th (Chinese Rite gains popularity in China) centuries. In 1704 the Vatican ruled against the compromises the Jesuits had made in order to bring Catholicism to China. The move against the Chinese Rites was followed by a general attempt to bring the other non-European churches (India and Kongo) into closer conformity with Rome. The result was a loss of the gains that Catholicism had made in the Kongo and China.
Now if the move is not made against the Jesuits' Chinese Rites, would the advance of Catholicism in Kongo and China continue? I think that the Jesuits might be able to gain more converts in China, but if the Church continues to grow, it will eventually have to reckon with an Imperial bureaucracy that will probably end up viewing it as a hostile force. If the Church gets popular enough though, it could end up too big to be cracked down on, and perhaps provide the Manchu Emperors a potential powerbase among the Han.
In Kongo, if the Church is able to continue, then it might have far ranging and positive effects. The Catholic Church's hierarchy is geared toward social order, which in Kongo's case is going to mean orderly succession and a unitary state. After all, how can the Church properly influence government if the country is in chaos?