Gaspard de la Nuit (Ravel) vs Trois Mouvements de Petrouchka (Stravinsky)

[moyukhpiano]

Both piano suites are considered to be pinnacles of "unconventional complexity and virtuosity", and thus are nearly equal in notoriety. But which one is more difficult to learn and perform, for any pianist?

[symphonicdance]

Both are super difficult technically. I am a bit more inclined to rate Gaspard more difficult, because comparatively it is harder to create the perfect sounds, superbly communicate and deliver all the music details.