The m-series is designed towards performance while the x-series is designed to be thinner and lighter with a few more fancy bells and whistles.  If you want the performance then go for the m16. 
Hello, I'm trying to decide which one to buy. On the Dell.nl site Ii can choose between an m16 R1 with 13900HX, 64GB and a GeForce 4090 or an x16 R1 with  13900HK, 32GB and a GeForce 4080. Which of the two is the fastest in gaming and let's say running virtual OS's in VMware workstation? But my focus is primarily on gaming. Thank in advanced.
m16 R1 vs x16 R1 ?