You give up 200GB networking, but anyone 'daily driving' one of these things are probably not needing to cluster multiples of them at high speed..
For those who are interested mainly in GPU performance, the NVIDIA system may be preferable. Otherwise, the Ryzen CPU is significantly stronger in multi-threaded performance, much stronger when running applications that are aware of AVX-512, so Strix Halo is preferable when the CPU performance matters.
Also for things like video decoding or transcoding, the DGX Spark GPU is likely to be weak.
I mean that's not as true as you'd think: in fact its the whole benefit IMO of the spark-alikes, and if you're not running TP=2 or above you're sort of wasting it's potential
The focus for Nvidia's GPU stack on Linux is getting CUDA working, which means that some traditional raster features get neglected.
I learnt three times that AMD isn't necessarily better in Linux as advertised, now I don't care any longer.