The linked kit is Hynix A. If I'm right, then all retail 7000+ kits nowadays are Hynix A. On the front page, there are some reviews: Patriot and KLEVV 8000, ADATA 7200, Corsair 7000, and G.Skill 6800, all kits with Hynix A-die. All OC about the same.
On motherboard QVLs, you can find other ICs and higher than standard voltages, but Hynix M at 6800+ was only in early samples and memory series that never hit the stores. For example, Gigabyte motherboards have 7200+ Gigabyte memory kits on the list with Hynix M and 1.55V voltage. I don't think anyone saw them in stores. The same I don't think that Samsung-based 7000 1.55V kits were in stores.
Motherboard QVLs are very confusing as most 6800+ memory kits were only test samples, and retail products are different. For example, most manufacturers don't release retail DDR5 memory kits at more than 1.45V. I was surprised that KLEVV has 1.55V kits (last review).
I already need 48/64GB kits for my gaming PC. Yesterday I checked the resources of my PC, and it reached 32GB RAM with CPU at about 70% load for most of the time.
Btw. in the link under the 32GB kit is a 48GB 8000 kit that costs $30 more. I will review the G.Skill 48GB 7600 kit soon (the same IC as 8000), but I can already tell you it passed the stability test at 7600 on AMD and is overclocking up to 8000 (for some reason, I can't make any kit boot at more on AMD).
I had no time to check how high memory overclocks on AMD at 1:1, but the latest G.Skill press releases suggest that with new BIOS, it can make 1-2 ratios more. It would give 6400-6600 1:1, which is possible at CL28-30. I'm just giving ideas to test