The 5600 MT/s bin in Micron's ECC RDIMM range sits above the 4800 grade in the same server-oriented DDR5 lineup — registered modules built for platforms that need error-correcting memory and can address more capacity per channel than unbuffered kits allow.
This one is a 1×32GB module at 32GB, rated 5600 MT/s CL46. As with the slower bin in this line, both capacities share one 5600 MT/s/CL46 pairing, so choosing between listings comes down to how much DDR5 a given channel or workload requires rather than any difference in timing.
This is RDIMM, meaning it needs a server or workstation board built for registered ECC memory; it is not a fit for a desktop board expecting unbuffered non-ECC modules.