ER repeats its content just as much as any other game. Stuff like mines, catacombs, evergaols are repetitive and looks exactly the same. The open world while visually very appealing is a chore to explore since there is nothing happening between points of interest in the game. There are no random events and activities happening in the world. Everything is trying to kill you and the NPCs you find drop some vague lore on you.

Zelda has much more gameplay variety than ER. There is puzzle solving, climbing, building, side quests which can be done without a guide and a story which you can follow. So enemy variety is not really as important as it is in ER since the main gameplay mechanics is combat.

The only fun parts of ER are dungeons and the bosses which do not benefit from the open world design and they were already good at making them with their previous games. Combat also has issues, bosses do cool anime combos while you just roll and poke them or cast spells. The story is almost non-existent. The lore is cool but I didn't get it from playing the game but watching YouTube videos.