I know some oriental populations of Greater have smaller bill than the typical Middle-East populations, so I wouldn't place great importance on the fact the bill is smaller than in typical populations. It is indeed the distribution map that makes me skeptical about the second one being a Greater. The picture is taken in the Udawalawe area, while the normal distribution covers the coastlines only, as pointed out by Andy. However, I am still seeing that white forehead which, from what I've seen, is more fit for a Greater.
But since so many opinions are favouring Lesser, I'll take it as such. Thank you everyone.