It WAS very similar, but I feel LoS did much better, especially in the whip combo department.
True though, it's orb system was very good, (and a good way to explain just what those orbs you get after beating a boss are) but thats really just IGA getting lucky IMO... Once again, look at CoD. He could have easily done just about anything else, another Belmont game, possibly sporting mechanics similar or better than LoI's, but no. instead we got Innocent Devils and an Alucard wannabe. :|