Theoretically it has slightly better memory bandwidth, (you are supposed to get) the Nvidia AI software ecosystem support out of the box, and you can use the 200G NIC to stick 2 together more efficiently.
Practically, if the goal is 100% about AI and cloud isn't an option for some reason, both options are likely "a great way to waste a couple grand trying to save a couple grand" as you'd get 7x the performance and likely still feel it's a bit slow on larger models using an RTX Pro 6000. I say this as a Ryzen AI Max+ 395 owner, though I got mine because it's the closest thing to an x86 Apple Silicon laptop one can get at the moment.
Practically, if the goal is 100% about AI and cloud isn't an option for some reason, both options are likely "a great way to waste a couple grand trying to save a couple grand" as you'd get 7x the performance and likely still feel it's a bit slow on larger models using an RTX Pro 6000. I say this as a Ryzen AI Max+ 395 owner, though I got mine because it's the closest thing to an x86 Apple Silicon laptop one can get at the moment.