Yes not all 1650/1650ti are the same.  Well depends of which Gaming Laptop you are purchasing Most Laptops have integrated GPUs (soldered on Motherboard) and are not as powerful as their desktop siblings. Some Alienware models ship with Desktop Grade Graphic Cards too. Depending on the model dell will select GPU model but will customize it to fit the respective model.  Dell has limited it to a maximum of 20W, : I don't have any official numbers for this. You can google. But one thing is for sure if you compare it with a G Series or Alienware notebook, it would be higher. Their's a reason those machines are shipped very Large Power Brick. 
I recently purchased an xps 15 9500 for both work and some casual gaming when bored, and I noticed that the performance in many games was not at the level of a 1650 ti. When I tried to monitor the temps, utilisation and power draw of the processor and gpu, I found that the gpu never exceeded 20W. Doing some research online, all sources say the maximum power draw of the 1650 ti mobile variant is 40-50W. So am I right in assuming that the gpu power draw is being limited by the laptop? The temperatures on the gpu also never exceeded 86C, which is said to be quite normal while gaming on a laptop. I am aware that the xps is not a laptop meant for gaming, and that the thermals are nowhere near meant for gaming, but still wanted to understand if the power draw of the gpu was being limited, and if there was any way to increase it.   Laptop Specs: i7-10750H 16 gb RAM 1650 ti 1920x1200 FHD+ display 60hz
Dell XPS 15 9500 - GPU Power Draw limited?