The International Olympic Committee and the International Paralympic Committee are two independent organizations, which can adopt differing decisions. The IOC has decided not to apply the principle of collective responsibility (IOC president Thomas Bach described a blanket ban on Russia as a "nuclear option" and clean athletes who would have been affected by it as "collateral damage") and ruled that bans were to be adopted at the level of the relevant federations.
The IPC, however, concluded that the violations committed by Russia are so grave that a complete ban would be an appropriate sanction. At the same time, Philip Craven expressed sympathy for clean Russian para-athletes, who, according to him, had been "catastrophically failed" by the Russian government.
The difference in the two organizations’ positions could also be attributed to the difference in their organizational structures. Disability sport is more centralized, so the IPC can take a decision for all federations. The IOC, as a looser association, has fewer powers and must take into account the positions of the federations, many of which were opposed to banning Russian athletes from the Olympics.