I'm currently playing FFXIV and I played WoW for many years. I'd say WoW has massively better combat, and a lot of QoL improvements over FFXIV. FFXIV has a wider variety of content and everything is more reasonably priced (cosmetics, services etc), I also really like their mob design and dungeons feel a bit more epic, although WoW does boss fights better. WoW also has better questing, the story quests in FFXIV are really boring and amount to run to NPC 2, read text, go back to NPC 1, I have gone an hour without killing a single mob before which just isn't fun. As a package I think WoW is better, especially when it's hot, right now it's stone cold so the gap is closer. I'll probably drop FFXIV like a rock once Classic hits.