Cortana vs Siri vs Google Now comparison videos required!

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Hi Tribe,

There are lots of articles and posts about Cortana lately and I must say that she is really impressive.

But what makes me curious is, as I have never used Siri and Google Now, if they can do or how they can perform the same voice functions compared to Cortana.

So, I would like to ask the community, who has access to all these 3 platforms to make a short comparison videos, so we finally could see how all these 3 voice assistants perform.

Thank you!