It just confirms that Nikon has more sensitive sensor.
I know you have set the same ISO so it should be the same.
I use Nikon D50 - and i love it. I have being inside of it more often then in my fridge and it still works.
every time i open it i find something new that just will not go back in, yet camera still works.
I love it!
I am not saying what camera is the best, it is clearly just a matter of opinion. They both excellent and share will have same/similar technologies that all manufacturers in any field some time ,,Borrowing ,, from each other.