Being the top cars in their segment, the guys at autoguide had to compare them. If you're in the market for a QX60 chances are you've also gave the MDX a look, if not, you should. Onto the review...
http://www.autoguide.com/car-comparisons/2014-acura-mdx-vs-2014-infiniti-qx60-3507.html
http://www.autoguide.com/car-comparisons/2014-acura-mdx-vs-2014-infiniti-qx60-3507.html