In 1999 Togashi created an illustration for Resident in partnership with Capcom, called "Resident Evil 3 Official Guidebook". He's a big fan of the franchise, and said that finished the game in 3 hours. Collaborations like these are common among manga artists. He also posted this art on Twitter account some time ago.
The dialogue between Hisoka and Chrollo before their fight is very interesting and has several layers; Chrollo states that the best part of his ability is to understand the dark side of the user who created it. Chrollo also believes that there's no difference between humans and puppets, and that is why he's able to give orders to the puppets.
He's driven by deterministic philosophies while Hisoka is the opposite, and I understand that Chrollo saying that style is the most important thing means that his philosophy and way of acting are more important which the result of his actions, despite him being bound by it due to his limiting thinking.
But this is ambiguous; while Chrollo seizes the moment instead of focusing solely on the outcome, he doesn't achieve his desired result and loses precious friends. A very contradictory and fascinating character.