My students read a series of quotations from Gandhi about his goals, and will be assessing how successful he was. One quote from 1928 was: "My ambition is much higher than independence. Through the deliverance of India, I seek to deliver the so-called weaker races of the Earth from the crushing heels of Western exploitation in which England is the greatest partner." (Young India, 12 January 1928)
Clearly, Nehru had the advantage of living 15+ years longer than Gandhi. As the leader of independent India, he was in a position to offer tangible support to independence movements. And it may be hard to measure the extent of Gandhi's inspirational influence around the world. Still, assuming Nehru shared that goal with Gandhi, can we say if one was ultimately more effective than the other?
Neither. Gavrilo Princip was the one who really got the ball rolling.