Running those tests on the XPS 13 would typically cause the fan to turn on after a minute or two if I remember correctly.
As I said, the M1 is a /great/ CPU. But the numbers are marketing numbers & should be treated as such. The same goes for the CPU in your XPS. It was sold with an advertised TDP, was probably configured by the manufacturer to a /different/ TDP target subject to the thermal constraints of the laptop & as an end-user you can shift the set-points of thermals vs power consumption yourself if you want to. None of this is new & Apple is no exception. If Intel hadn’t completely failed to deliver their last 2 fab shrinks, you’d be sat here raving about how amazing your passively cooled Intel Mac was I imagine.