Brilliant Moves in New Game Analysis Report

I have been wondering what defines a "Brilliant Move" rather than just a "Best Move" in the new game analysis report ( https://www.chess.com/news/view/improvers-rejoice-new-analysis-feature-is-now-in-beta ).
From my own games,
18. f4 is marked as a "brilliant move" in https://www.chess.com/a/qtjk2dMg44. Kc6 in https://www.chess.com/analysis/game/live/34676643792 back-to-back "brilliant moves" 19. exf6 and 20. Rfe1 in https://www.chess.com/analysis/game/live/3476510047I would not have anticipated marking any of these moves as particularly brilliant or surprising (though 20. Rfe1 comes closest), so why are they singled out? It cannot be simply a large evaluation difference as capturing a blundered queen does not get marked as a brilliant move. Any ideas? What "brilliant moves" have you found?

I have been wondering what defines a "Brilliant Move" rather than just a "Best Move" in the new game analysis report ( https://www.chess.com/news/view/improvers-rejoice-new-analysis-feature-is-now-in-beta ).
From my own games,
18. f4 is marked as a "brilliant move" in https://www.chess.com/a/qtjk2dMg44. Kc6 in https://www.chess.com/analysis/game/live/34676643792 back-to-back "brilliant moves" 19. exf6 and 20. Rfe1 in https://www.chess.com/analysis/game/live/3476510047

whenever iclickon the link, it shows that there r 0 brillant moves, instead they r all great moves
I would not have anticipated marking any of these moves as particularly brilliant or surprising (though 20. Rfe1 comes closest), so why are they singled out? It cannot be simply a large evaluation difference as capturing a blundered queen does not get marked as a brilliant move. Any ideas? What "brilliant moves" have you found?