It is not too difficult to figure out the comparisons between Cortana and Louise, and it also goes to show the lengths and amount of progress that Microsoft has achieved where the Cortana digital assistant is concerned. Chances are Louise could very well be a name that might have made it to the Windows Phone 8.1 platform, but after all that is said and done, do you think calling it Cortana could be a whole lot better?
Apart from that, it can be inferred that Microsoft did not come up with Cortana just as part of a knee-jerk response, since the beginnings of the Cortana digital assistant seems to be a whole lot more ancient than before.