The only difference is the heatsinks, as the same Hynix memory chips are under them. At least all 6000-6400 CL30 kits use the same Hynix IC, simply because other brands do not have an IC that can make it.
In short, you can buy Royals, but they will cost significantly more, so it's up to you. If you have more money to spend, I recommend a 2x32GB kit as it will be dual-rank, so it will be a bit faster in some calculations. I just listed kits that I find interesting right now.
6000MT/s seems optimal, while the best will be 6400MT/s. However, not every CPU works at 6400 and a 1:1 IMC/IF ratio, so the recommended safe option is 6000 CL30, as it works with everything. Your future motherboard (assuming any ASRock X870E) will support 6400 1:1, so the only question is if the CPU can handle it.
It's just additional information if you wish for something a bit faster. However, you probably won't notice a difference.