Lancer RGB is XPG's — ADATA's gaming brand — mid-tier DDR5 line, an aluminum heatspreader with a diffused light strip along the top edge. It sits in the middle of XPG's range: dressed for a visible build without being the flagship part.
The whole family is rated 6000 MT/s CL30, so nothing here trades timings for capacity — a 2×16GB kit at 32GB carries the same rating as any other size in the line. The decision is really just how much total memory the build needs, and how many of the board's slots you want left free for later.
This is DDR5 UDIMM for desktop motherboards, non-ECC. Reaching 6000 MT/s means enabling the XMP profile in BIOS; without it the modules run at a conservative JEDEC default well below the number on the box.