Kemp is a scientist with no secret ambitions and normal social
relations. Thus, he shares his experiments with the wider scientific
community for general good, which is the purpose of science.
Griffin is more isolated from the society; he remains absorbed in his
experiments and harbours secret ambitions. Moreover, he is very
unscrupulous; he does not hesitate in robbing his own father for
financing his experiments and shows no remorse even on his death.
we see that Kemp turns out differently because of his good intentions
and normal social relations. Griffin is socially isolated and secretive,
with evil intentions, and this is the cause of his demise.