I could buy that (as a generalization rather than a hard and fast rule).my thought is that in aiki the Tori does break the structure but in a more subtle way than judo. (keep in mind all of these are general statements that do not always apply).
from what i see in Judo there is at times a reversal of force/ energy that facilitates the throw. left to right or front to back. in aiki you dont see that much. you get a more gradual vector that over time/distance the uke loses his structure.