Replaying Crystal Project on Hard (though with a few things, notably teleport stones and maps, from the previous playthrough).
As expected, Hard is harder than Easy. (Every once in a while, there's a game where this fails to be true, or where some part fails to be true. For example, I've heard that, in Touhou 6, Cirno's first spell card is harder on Normal than on Hard. Also, Hodj 'n Podj has one minigame, a pac-man clone, where higher difficulties give you more points, and more points means more extra lives, making the minigame actually easier at the harder difficulties.)