8400mhz ddr5 worth it?

Hi guys,

going to get the 14900ks when released with custom watercooling motherboard either z790 formula or apex encore

as for the ram I am torn between 7200mhz cl34 corsair titanium love the looks or the 8400mhz gskill cl40 the price difference is about 150-200eur what are your honest opinions?