It's pointless wasting time on questions that there can be no answer to but forums would die if nobody asked questions especially newbies. We welcome your question.
The question itself is meaningless because it refers to Nikon or Canon as a camera. They are not cameras they are multinational designers and manufacturers of ranges of equipment some of which are cameras.
There are some really helpful and friendly people on this site and none of them can answer your question until you specify which particular cameras from Nikon or Canon you wish us to discuss. Also, as a matter of grammar, you don't need two question marks.
Oh no. I've just wasted time on a meaningless question and criticised your grammar....I must get out more