Going into a PhD in Europe or US I am an International Student perusing a Masters in Actuarial Science in the US. I did my Bachelors here in the US (Actuarial Science), worked for 2 years as an Actuarial Analyst in the US. I am doing my Masters now with emphasis on AI (I could not get into an AI program for Masters due to my circumstances, so this is the closest I could get).
I want to continue with AI and I am looking into a PhD in the N.America or Europe. I am excited about Europe (never been there), but feel N.America will be a safer bet. Which location would be better to do my PhD in, if I am looking at eventually migrating and getting into tech entrepreneurship?
I am afraid your question reveals a rather superficial attitude to the matter. You are talking about the whole continents as places for &quot;better PhD&quot; and mention &quot;AI&quot; as a field you are interested in. A fairly standard textbook on AI sitting on my shelf is nearly 1200 pages long, so how can one judge a continent for being a better place for studying every single topic listed in this book?
You are going to spend several years doing your PhD. So, first go spend at least several days (or, better, weeks) thinking harder what exactly are you interested in. One good starting point would be to think first what you are good at right now. Then, figure out good publications in this area (Google Scholar is your friend) and find out which labs they come from. These labs are the places of your interest, and they might pop up in quite unlikely places (though, granted, in most cases they don't come as a surprise).
Then, of course, there is a question of a job market, but I believe people coming from reputable labs are able to find a job. In any case, this isn't a question of your immediate future.