Ya Warthog tusks can vary alot depending on Area's, Genetics, soil type, food source ect..
Some have tusks are thin, some can be very thick
some pigs have quite strait tusks and others can have a full curl, there can be a lot of variation.
Andrew I land in Brisbane 11th May
wont be down in Sydney for a while but when i get down that way ill give you a shout.