That is outdated info.

The maximum you can configure the M4 max is 64 GB and for M3 ultra it's 96 GB now.

So RTX spark is fine.

You finished trolling?

QuoteAsus reveals pro-grade Mac Studio rival mini PC: Nvidia RTX Spark

Not a rival: A NVIDIA Spark is based on a NVIDIA's GB10 chip (273 GB/s) (en.wikipedia.org/wiki/Blackwell_(microarchitecture)#Blackwell_dies), while a Mac Studio is/was based on Apple's M4 Max (up to 546 GB/s) or M3 Ultra (819.3 GB/s) chips.

Unfortunately Apple doesn't sell higher RAM configs anymore:
en.wikipedia.org/wiki/Mac_Studio: "Configurable up to 512 GB until March 4, 2026;[30] 256 GB until May 5, 2026[31]".

If the Spark had 192 GB or 256 GB RAM configs, then, even with the lower GB/s, one might call it a rival, because at least then it would have more RAM than a Mac Studio.