Hey there--this is an easy one! : ) If you are looking to get into the world of BUSINESS, then there is no reason to get the job in Nielson. It is a market research company as you know, and therefore it wont be impressive to a future employer, or admissions committee. On the other hand, any job at a large US company will be helpful for you. At this stage in your career, 100% you should focus on name and reputation. That will serve you the best in your budding career.
I hope you find this to be helpful, and feel free to reach out if you have any more questions for me. Id love to help.