Before that I tackled crocodiles and loved it
Given your profile pic, the above quote and your indecision over which job to take one could assume you are motivated by working with animals and not necessarily by money and there is nothing wrong with that.
My point exactly, $100K per annum for 6 months is a $50K contract, if the $50K ranger is not on contract it begins looking more attractive.
However, as Krafty has pointed out make sure you are comparing apples with apples. Is super included or is it over and above the $50 or $100k?