gilby123I'd say the main difference between the two is the campaign book in Arcadia Quest that allows players to go on this journey through different scenarios in order to finish the campaign. It plays very much like a RPG video game where you can choose from a variety of scenarios to play while upgrading your characters along the way. Winners are determined by the quests given to players in the scenarios that involve both PvP and PvE (player vs. environment) where a player must kill a neutral monster. Each scenario is around 45 minutes so games can get very long, but there is a "save" booklet that you can use to resume the game at a later time. If you like Krosmaster, then you'll most likely enjoy Arcadia Quest because the mechanics are very similar but there's just a bit more variety in Arcadia Quest that goes beyond just killing your opponents.
I'd recommend reading the rulebook linked below in order to better understand the game.
http://arcadiaquest.com/AQ-Rulebook.pdf
I'd recommend reading the rulebook linked below in order to better understand the game. http://arcadiaquest.com/AQ-Rulebook.pdf