You can read the complete article and Analysis here:
Switch Vs. 3DS and Wii U Global:
Gap change in latest month: 1,974,103 - Switch
Gap change over last 12 months: 2,461,694 – Switch
Total Lead: 1,241,230 – 3DS and Wii U
Switch Total Sales: 44,771,334
3DS and Wii U Total Sales: 46,012,564
The gap is closing. For quite a while, a common way to downplay Switch's success was the argument that "because it's a successor to both Wii U and 3DS, it has to outsell them combined to be considered a success." Well, looked like it's going to do so with ease.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.