I should think so, plus a general belief that Asians were "civilised" whereas Africans were not (something that probably goes back to the Middle Ages with its legends of wealthy civilisations in the east). Also, early modern Christian missionaries to Asia tended to be Catholics, while the Protestants had proportionally more success in Africa. And Catholic missionaries generally treated the cultures and religions of their host countries with much more respect than Protestants did. Interestingly their converts often inherited these attitudes: Asian Christianity typically involves traditional ancestor veneration, whereas African Christianity typically involves "burning the fetishes" (or it did for much of the twentieth century, at least). For Asians, converting to Christianity did not mean abandoning the traditional practices of their culture, whereas for Africans it did. (This is a very broad generalisation, of course, and I'm thinking mainly of east Asians here rather than south Asians.)