You can read the complete article and Analysis here:
Switch vs 3DS and Wii U in the US – VGChartz Gap Charts – November 2019
Switch Vs. 3DS and Wii U USA:
Gap change in latest month: 717,793 – Switch
Gap change over last 12 months: 1,317,984 - Switch
Total Lead: 1,031,793 - Switch
Switch Total Sales: 15,564,941
3DS and Wii U Total Sales: 14,533,148
It's especially gratifying to see Switch trending ahead in this one given all that "it's not a success unless outsells 3DS + Wii U combined" downplaying in 2017-2018.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.