Fallout 1 or AC Valhalla?

I love action games, and also games like diablo 1-2-3, so i saw that fallout 1 with extremly good reviewes, but also i love AC series, i have mostly of the games avaible on pc, from the first one to Oddysey, and now im planning to add Valhalla to my collection now its on offer, but, which from this two games do you recommend to me? i love good stories and good soundtrack.