Dell XPS 9550 vs 9560 SSD hard drive differences

Hello people, is there any difference between the SSDs of the 9550 and 9560 (being faster, etc) or are just exactly the same?
The idea is to interchange them between the two models and do not "downgrade" the 9560 with the SSD from the 9550.

Dell XPS 9550 vs 9560 SSD hard drive differences