I recently bought a few sparks from Micro Center for the exact same price and it comes with ConnectX-7 200Gbps inter-connectivity. Not sure how AMD feels it can charge exactly the same for less.
The differences are basically, sparks require ARM and sparks allow interconnects; so if you do have dreams of electric sheep to chain them together, you're not gonna get the AMD halo units.
But if you just want to putz around with a dev machine and do other things, not sure you'd want a spark.
I do wish didn't buy the one that only had the 1TB nVME in it though. It's one of those expensive half-sized dealies, which makes upgrading expensive. Esp now.
Which is a huge problem? Even using 2x memory controllers in typical consumer motherboard can make system very unstable.
You'll never see that 200 Gb/s running inference.