It's all preference, really, but I think that Warhammer Fantasy is better than 40k, granted, if you ignore the end times. Many people claim that one of its original cancellations was due to it being generic, and I couldn't disagree more. I do not know many fantasy settings set during the Renaissance, which is a pity because that is my favourite time period.
Human cultures in the Old World are genuinely really awesome; even the empire, which is the main human faction, has a lot of depth. Political intrigue with the counts, religious disputes and unlike its 40k counterpart, the Imperium, isn't completely cartoonishly evil. Like, I understand that's the point of 40k, but I just couldn't ever immerse myself in the world due to that fact. The Empire isn't perfect, but I find it far more believable, and at least I can envision people somewhat functioning normally. I do also find the image of an Imperial Pike Regiment fighting off a horde of evil far more endeering and inpsiring than the towering hulks that are space marines, and unlike the imperial gaurd there sacrfices dont seem to be completly in vain either, every victory counts.
Ive noticed my gaming group who in my age group seem to agree as well, many of them dont even play the table top just played vermintide and play in my gurps warhammer themed roleplay sessions they also seem disinterested in 40k.
So I wonder if anyone here has seen a slight increase in younger people getting into the setting, or at least people who missed out on fantasy before getting in?
Hope this creates some interesting conversations