The fact that 2 people are playing it disqualifies from being considered "difficult" for solo piano lol.
Either way, tbh it doesn't come CLOSE to the difficulty of some of the T.E, Islamey, Gaspard De La Nuit, Grand Galop Chromatique, and certainly not Galop in A Minor (which I believe is the hardest piece that lasts less than 10 minutes). Heck, some of the Chopin Etudes might be harder than that (looking at Chromatic and Double Thirds).
Then again, who am I to judge? I've only just finished Fur Elise and Raindrop Prelude and have been playing for about 8 months. Take my opinions on difficulty with a healthy dose of salt.
Difficulty is subjective anyways though. Just because I have my opinion doesn't mean you don't have yours, and vice versa. There are plenty of people, both less and more qualified than me, who think the opposite. There are plenty who agree. I could go on, but I think you get my point.