THOR Z RGB is Lexar's enthusiast DDR5 desktop kit, sold as a matched pair at one fixed capacity across the whole family — the variation here is entirely in the speed bin, which runs unusually high for a UDIMM kit.
2×16GB at 6000 MT/s CL36 is what to read closely: two THOR Z RGB kits can carry the same 32GB while sitting at quite different speed grades, and the faster bins in this family sit well above what most desktop boards will run without deliberately selecting a fast EXPO or XMP profile in firmware — some boards may not support the top grades at all.
It's DDR5 UDIMM with RGB lighting built into every kit in the line. Check your board's supported speed ceiling before ordering toward the faster end of the range.