Interesting overview. From my personal experience I can highly recommend the Razer Studio Edition 2019. With the RTX Quaddro 5000 Max Q, you get 16gb of ram which is a big advantage over the other Laptops in the high end catecory with 2080s and just 8gb.

The compute Score is the same, but you can train bigger models or with bigger batch sizes …

So I would recommend to add this. Furthermore from Dave2Ds Youtube Channel I know that the Legion7 has thermal issues, so all the power will be not useful for training.