Just off the the top of my head some improvements:
* Weapons and armor are more graphically sound.
* The graphics in general are WAY better. Once you get the game (If you do) you will see.
* Everything is a lot more balanced, mob wise, stat and skill wise, etc, etc.
* Speaking of mobs, there are A LOT less of them in DKS. For instance, in ED as soon as you get to Broken Valley and walk down the road you have the 2 hogs and the 2 goblins attack you. In DKS, you have the 2 goblins, but they are MUCH weaker. Without investing anything into any skills I 2HKO'd them. This is what they fixed. Basically, the start of the game was the hardest and once you hit lvl 15+ the game was easy, not with DKS, it progressively gets harder. ^^;
* In the balancing, they made some items less or more. Example being in ED Jackon's amulet will do grand until lvl 15, if not further because it's just that amazing (Kill Carl and you get it.) In DKS, it has a WAY weaker +1 Evasion. An item I found an improvement in was the Amulet of the North. This requires you to only invest 2 points into Wisdom to get the max 5/5 before Battle Tower, which I did. c:
But, no DKS isn't really all that different. A big improvement. I assume it is what ED was originally supposed to be like. (: I would suggest buying it over ED unless you like the challenge of the starting area in ED, but other than that, DKS is better. I personally liked the challenge, but that's me.
