Based on Sony's and Nintendo's FY forecasts and game line-ups and current sales, it seems like Nintendo plans on having hardware sales heavily focused on the second half of the year, of which will be very weighted to October through December. While Sony looks to be favoring a much more spread out throughout the year sales trend of moving hardware.
I think Nintendo Switch will outsell PS4 by a large margin, but that really isn't that noteable given how they are in different phases of each their respective lifecycles.
What will be more interesting is launch alogned sales of the Nintendo Switch compared to the Wii or the DS as the years roll on. A healthy tail on Nintendo Switch's lifetime sales could surprise a lot of people and be Nintendo's best selling system of all time. There are a ton of factors that could stiffle that possible future, but Switch still has the current momentum in this stage of its life to claim that opportunity with the right hardware revisions, price cuts, and games over a much longer than usual lifecycle.
