I can see why it would be good to read Hayek from a Misesian point of view. THats how I read Hayek’s work, since I just recently started to read him (well a few months) and I already was well read on Mises.
But the blog post is not really the topic I wanted to bring up here, it is the comment that I quoted that I want to discuss. It is basically saying that both these economists are actually very similar. The reasons on why they differ refers to the audience they were trying to debate with. Mises put strong emphasis on rationality and reason precisely because his critics were the German mainstream Econ school of thought. (which is very consistent to what is in “Principles” by Menger) and the reason why Hayek put strong empasis on Knowledge was because his contempories were the central planners that thought they could plan everything just fine. (which the topic of ‘lack of knowledge’ is influenced by “Investigations” by Menger. )
If the initial comment is valid, then I would say that this is the best reason to why they differed.