>>96490104 (OP)
I feel like you should be able to tell from even the most surface of level of each, even from just looking at some art and models, which one appeals to you most. They have a very obviously different vibe and focus. And in terms of gameplay again one glance shows a difference of gameplay so huge its probably enough to make a determination off of-one is a rank and file game that looks more like real historical battles, one is a game of blob units seperated into stand alone models like a super unrealistic battle scene in a movie. Whichever one of those sounds like the kind of gameplay you'd like more will probably lead you to make the right decision in light of the rest of the rules.
Personally I think the old world lore and world and look is so absurdly, infinitely better its a night and day difference and I'd always go with that. But if I put myself in the mindset of someone who might like AoS more it would be really easy, at first glance, to tell it appeals to me more.