Tokio | Cairo [blprnt.com] is a novel visual text comparison tool, which enables the discovery the similarities and differences between Obama's famous open address to the Muslim world, given in July at the University of Cairo, and his recent speech delivered at the Suntory Hall in Tokyo.
Several keywords were shared, such as 'America', 'world', 'common', 'human', 'responsibility'. At the far extremes, the speech in Cairo was about 'Islam', about 'Palestinians', about 'peace', 'faith', and 'communities'. The Tokyo address was about 'China', 'North Korea', 'security', 'agreement' and 'growth'. In addition, Obama makes many more mentions about 'peace' in Cairo (in Japan, this word seems to have been replaced by 'security'), and far more mentions of 'prosperity' in Tokyo. Interestingly, "Though one of the five occurrences of 'rights' is in reference to China, it appears from this analysis that there may have been a deliberate plan to keep the 'human rights part' of the speech separated from the 'China part'".
Note that this visualization tool was previously also applied to compare two very similar articles published on head injuries in the NFL.