Uh, you're right that the Switch is noticeably stronger but no, the Gamepad uses the console's power to render everything, all you see on the Gamepad, game-wise, is just a video stream off the console....The Gamepad has its own separate output for rendering, it doesn't use processing power of the main console itself.
Seriously? It's 2019 and people still think the Wii U is stronger? Goddamn people.