...who would give up the piano bench?
Yeah, fine, these kinds of discussions are premature...sorry about that...but I always entertain myself by imagining these "what-if" scenarios involving some of the finest piano players duking it out.
Incidentally, who do you think would win between...
Bach and Saint-Saens (organ)?
Mozart and Beethoven?
Czerny and Clementi?
Liszt and Rachmaninoff?
Liszt and Alkan?
Liszt and Cziffra?
Horowitz and Rachmaninoff?
Players are expected to 1) play their hardest pieces, 2) sight-read a difficult composition by their opponent, and 3) improvise on some random tune they haven't heard of before. The guy who does better at any or all of the three sections could be considered the winner.
My source of inspiration comes from what I read about certain "musical duels" that were a hype during the Baroque-Romantic eras. Bach, Beethoven, Mozart, Clementi, Thalberg, Liszt, are perhaps some pianists I read about who constantly emerged victor in such encounters.
If I'm not mistaken, there was some sort of "format" they used for these contests - I've read somewhere that a guy who once wanted to "make mincemeat" of the grumpy Beethoven was bested after he was "out-improvised"; Beethoven reportedly sight-read a hard sonata of his, upside-down, and played around it for about 30 minutes until the opposing piano player finally gave up and left without speaking (sorry, forgot his name...). This "format" inspired the "three-section duel format" I wrote above.
It's also interesting to include the rebirth (?) of these "piano duels" in the late 19th, and early 20th century America - of which African American jazz/proto-jazz musicians loved challenging each other to determine who had the flashiest improvisations...Louis Chauvin, Jelly Roll Morton, Fats Waller, and Art Tatum to name some of the ultimate men to beat...
What do you think?

Btw, here's an interesting French video I've seen before...
...I think they're supposed to "out-improvise" each other or something. They seem to be following certain rules and a "time limit".