This version on the Xbox 360 is unique because it set several encouraging milestones for the online store. It was the first console port available for download. It was the first game that broke the 50 Meg limit, luckily it was not the sole exception, and an increase in space was soon allocated for all Live Arcade games. Finally it was not the type of game that you would expect to find on the Xbox 360, a 2D game from the era of 3D dominance on a console filled with FPS games. It's a strange world, indeed.
Graphics are mostly the same, with only minor graphical differences that will probably only matter to the purist, like the different coloration of the windows in Olrox's chamber. Everyone knew it was a port of the Playstation version, so no disappointment here.
Sound remains the same, save for new sound effects for the Life Max Ups and Heart Ups items. A neat addition in the ability to play any music you want from your Xbox 360 hard drive. I guess that would be a roundabout way of getting the Saturn exclusive music in the game.
Gameplay is still the classic Symphony of the Night adventure and it is timeless. There are some unique instances of slowdown in the 360 version involving the Heart Refresh and Sword Brothers items in certain areas of the castle, but these only affect map completion percentages. There are of course achievements; some good ones like beat the Inverted Castle with Richter. The money one is stupid, casting every spell is a good dexterity test. I really think that they should have had one for obtaining the rarer items, as there are plenty to get, Fist of Tulkas, RuneSword, Masamune, Crissagrim, the list goes on.
In closing, this version of SOTN is best suited for newer gamers who may only own a 360, no doubt the intention in its release. Spread this 2D paragon of gaming to as many places as possible, Konami!