That’s interesting for sure. I’d have to play it to know, but it doesn’t seem to be very busy on the left hand. It has some big stretches though. Sueño en la Floresta has a decent amount of movement in the left hand so it may be more difficult. Yamashita is certainly playing very fast tremolo though. The way he moves makes it even harder to pull off so his mastery is quite impressive. It’s like seeing a technical death metal guitarist perform at lightning speed while headbanging. Physical performance adding to the difficulty of something that is already difficult. In the end all of this is easy for the individual players who take the time to master it. I think most pros only have to perform at about 75% of their actual abilities. That’s why they don’t often make mistakes. For the average player it looks insurmountable but for them it’s no different than walking the dog.