When you’re buying a laptop you can’t just look at the raw specs. The whole rest of the laptop plays a huge role in performance. Cooling and artificial power limits play a much bigger role in those devices than a desktop.
I have a ThinkPad P1 Gen. 6 with an i9 and rtx 4090 laptop. Should be killer right? This thing gets trounced by i7 4080 gamer laptops. Why? Because the CPU is limited to 35 watts when the GPU is active, and the GPU is limited to 85 watts. Meanwhile the gamer laptops will let the CPU run at 100+ watts and 150 watts on the GPU.
I’d just use the massive sites like TPU to get a vague idea of how things stack. Then look for actual reviews for the laptop you want.