I'll bite.
BotW is much more cohesive in it's design, and the way the core mechanics tie into the main gameplay loop of going out and exploring.
Having Hyrule as the main area for exploration makes for a much more rewarding experience than Hyrule plus disappointing sky islands plus disappointing Depths. Exploring Hyrule in BotW is all killer, whereas two out of the three overworld layers in TotK are underbaked and fail to live up to their potential.
The Skeikah powers in BotW fit the main gameplay loop better, and while it is possible to exploit them, it's much more difficult. Ultrahand on the other hand makes it incredibly easy to just break the exploration loop in TotK. You can make rocket powered balloons within a few hours, watch trivialises any mountains or valleys. Not only that, the Sky Islands mean it's easier and quicker to get to new parts of the map by gliding off them rather than actually traversing or navigating the environment.
This is at its worst in the Depths: you're supposed to be scrabbling around in the dark from root to root, but building a hover bike means you can just fly straight from one to the next.
Lastly, BotW has the more compelling main questions:- Ganon is waiting for you in the castle, you've got to go power up the four animal mechas before going to face him. It's simple, but a perfect set up for the game.
TotK on the other hand has Ganon getting revived by some unknown force, there's some sort of evil Zelda going round causing mischief, people don't have weapons for some reason, and you have to go investigate these random phenomena. It's a much more complicated set up that isn't as concise in summarizing the games themes and ideas.
TotK has the better dungeons and bosses, and the physics are genuinely amazing, but aside from that I'd easily put BotW as the better game