A long time ago, an iRO player that goes by the name Nightmaren wrote an in-depth blog entry comparing RO, the first version of RO2, and the second version of RO2.

The Evolution of Ragnarok

It's interesting to see how GRAVITY changed things around when translating RO into a 3D experience. For many RO players, both attempts failed. But there are those who developed a fondness for either the first or the second version of RO2 (or both). It's just disappointing to see so much potential just killed off and dumped onto someone else (Gravity Interactive). It's obvious that GRAVITY allowed themselves to be held back from making a decent game for the sake of profits.