I honestly stopped playing FF14 because I was tired of the gear treadmill. I got my crafting/disciplines to max, fully melded for 3 star crafting and 2 star gathering, then they release better stuff and I just can't do it/keep up anymore. Crafting/gathering/gardening was literally the only thing I did in that game.
I switched to GW2 because once you got the best gear (Ascended/Legendary) you're set and then you just play for fun and do what you like and not have to regrind for gear.
But that's pretty much it. Everything overall FF14 was better... the crafting.. dungeon.. leveling.. housing.. questing.. gardening.. chocobo breeding.. etc, all of that just way superior.
However, with the GW2 expansion, I think it gets even better with the Guild Halls stuff, and that will be pretty much on par/better than FF14s housing (probably).
When it comes to the dynamic world, both are pretty much equal. In FF14 the events also repeat and spawn in pretty much the same locations, like GW2, so not much difference there, but GW2 has more variety in their events.
World Bosses I think GW2 does it a lot better than FF14. If I recall, the world bosses in FF14 were the Hunts, and doing that shit was fucking fustrating as hell. You had to rush your ass over there and make it in time and do a certain amount of damage to get full credit, and if you got there too late, then too bad. A lot of times people don't wait and they just rush it and kill it in 5 seconds, plus you never know when it will spawn unless you're in a Hunt Linkshell. In GW2 you know when bosses are gonna spawn since theres a fixed schedule, and then you can prepare/head there earlier and always guarantee a spot.
If FF14 didn't have the gear treadmill and subscription fee, I'd be playing that right now no doubt.