Can anyone tell me why the Insights and Adwords tools by Google are giving me different results? If you enter a batch of keywords into Adwords and the same keyword batch into Insights the results do not match up at all.

Wordtracker for me has proven hopeless, so which of these two tools is the liar and which is telling me the truth? Adwords ranked two keywords the same at 60k searches a month, whilst Insights gave the one a score of 58 and the other a score of 20!