Nintendo explains the differences between 3DS & Switch, thinks key factor in what you decide to buy is price

Coming from Reggie Fils-Aime...

“The gaming experience is a bit different. The Switch is more powerful than the 2DS and 3DS machines, and has other hardware differences. A key one: a DS is smaller than the Switch tablet, making it easier to fit into a pocket or backpack. For many consumers, the decision to buy one Nintendo device over another likely will come down to price. At $299, a Switch costs about double a new 2DS XL. Having multiple Switches is expensive."

Price is definitely going to be a major factor for parents when looking into picking up a gaming device for kids. New 2DS XL is cheaper and has a much larger library of games than Switch. In a few years, we'll see where this match-up stands.

from GoNintendo