Skywalker Plus is V-Color's plain DDR4 kit, a 288-pin U-DIMM module without lighting, and the two listings here differ only in how much memory is on the sticks.
Both run 3200 MT/s CL16, and 32GB is delivered either as a smaller pair or as 2×16GB at the top end, with the clock and latency identical across the range — the rated speed still needs the board's XMP profile enabled rather than running on its default setting.
This is standard unbuffered DDR4 for a consumer desktop board; it needs the same non-ECC support any mainstream socket already provides, and nothing here calls for a registered or server board.