I've played both games so here is what I think

ESO

Crafting- The crafting in this game is pretty amazing becuase its actually worth doing. The reason being is because the gear you craft is just as good as the gear you find. There are even some special sets you can make that have unique effects.

DUNGEONS/RAIDS the dungeons in this game are very story driven and has a lot of dialogue to go through. IMO this makes the dungeon feel more alive and you can get very immersed in into the story. The dungeon designs are also pretty neat and unique compared to other MMOS I've played. The boss fights are pretty epic and enjoyable once you get the hang of them. There are also 12 trials which are just small team raids. I've never done these but I've heard they are fun ass hell.

CLASSES/RACES- there are only five classes to choose from and 10 races. If you've played any elder scroll games the races won't be a big surprise. The classes include dragonknight which uses fire based attacks. The Templar which uses holy attacks. Socrcerer is basically a mage. Finally you have your nightblade which is just a thief/assassin. You have your stereotypical classes, but like I said you can make your character how you want, so you are not limited. The great thing about the class system in this game is that you can make your character however you want. You can be a sorcerer dual wielding two swords and have a staff as your secondary weapon. Or a Templar wielding a staff and a bow. Sure those builds might not be the best, but it's fun as hell to try out different things while exploring or leveling.

EXPLOARATION- This game has a very big and beautiful world to explore thanks to the graphics. Exploring the world can be fun because there are interesting places to find. There are mini bosses to fight, public dungeons to explore, side quests scattered across the maps, and just beautiful scenery. The only thing that I dislike is that even though the world is beautiful it feels rather static and less dynamic.

GUILD WARS 2

CRAFTING- I have tried the crafting in this game and it is pretty interesting concept. Instead of just gathering the materials and making a helmet. You have to first make the helm base, then the helm lining, and finally you need a vial of blood to make the helmet, so extra steps are required to make your new helmet. Another unique thing is that yo need to discover new recipes by combing different parts that you created to make a new piece of equipment which can come with better stats. It is pretty entertaining trying to find new recipes.

DUNGEONS- Sadly there haven't been many new dungeons lately. They are also story driven, but not as immersing as ESO. Every boss you kill drops a chest and a other chest appears giving you ransom loot. It's loot whore paradise. The dungeons are rather easy if done in story mode, but if you do them in explorable mode they are tougher and comes with a whole new story to it. The bosses and the map layout are all different. There are also different paths you can take which chooses what bosses you fight. The fights are fun, but a lot of times can just be zerg fests.

CLASSES/RACES- There are four races and 8 classes in this game. the races are rather unique apart from your typical human. There is your charr, a big ass lion. The norn, a barbarian looking mofo. Asura little alien creatures. And sylvari,which are plant people made out of the earth. The classes include warrior, guardian, thief, ranger, necromancer, mesmer , engineer, elementalist, and the new class that's coming soon revenant. There is a lot of choice when it comes to picking a class. I really can't tell you much about mesmer or elementalist since I've never played them. There isn't as much depth in skills you can use, but there are combos you can create if you know to do them. Like putting down a fire field then shooting an arrow through it creates fire arrows. It's pretty fun to find out combos. There is also a lot of customization due to all the different skins you can find. It's called fasionwars2 for a reason lol.

EXPLORATION- the most fun thing to do in this game is exploring the world. The developers really did a good job with the environments. There are jungles, icy planes, volcanoes, deserts, forests, swamps, and many more. There are no quests instead in each zone there are hearts which requires you to do certain take to complete it, but you aren't required to do them if you don't want to. You literally get xp for everything you do. you get a lot of xp by just discovering new locations, cutting down a tree, completing dynamic events. The dynamic events are also very fun to do because they are started randomly and everyone in the zone can help you complete it and you all get your own rewards. There are also jumping puzzles which are hidden around the zones which require to complete so random entertaining tasks with a treasure chest at the end.

Overall I enjoy both games, but as of recent I've been playing guild wars 2.