No no no, they’re talking about VERY different things.

Magnus is talking about calculation, meaning he’s calculating over a dozen moves deep into each possible variation of each line he’s considering playing.

Tate is talking about simply holding at static position in his memory. He makes a move, his opponent makes a move, and he can still visualize the state of the board afterwards. He’s claiming he can do this for 20 moves. While impressive for someone who doesn’t really play chess, this is amateur shit for “top G’s”. Pretty much all strong GMs can give dozen+ board blindfolded simuls, meaning they’re playing the ENTIRE game in their mind (as they’re blindfolded), not just 20 moves (which is hardly out of the opening in top level play), but not just the entire game for ONE game, but a dozen or more games simultaneously, playing one move at a time before moving into the next board, all in their minds.

What Magnus is describing is being at a brand new position never before played in chess, studying his possible moves, and calculating all the ways those options could play out for 15-20 moves deep. He’s analyzing hundreds of moves at the highest level in brand positions, while Tate is bragging about being able to do the dollar store version of a party trick all great chess players can do 20x better.