Same old game, different characters
The gameplay on the other hand is still the same as all the other classic Castlevania games. But the thing about Bloodlines is it does play better than Dracula X. Ritcher Belmont couldn't even jump five feet off the ground and the game was so difficult. You'll spend allot of time on the same stages. Bloodlines do make things easier on you. You can either play with Morris or Eric. Morris is recommended for advanced players only. While Eric is for novice gamers because he can jump dive 8 feet into the air! While Morris has the god awful jump that the Castlevania series is well known for.
Eric is more balanced than Morris but both characters can be fun to play with if the game wasn't so sluggish. As far as the music goes its still the same Symphony/Classical songs. Of course the second stage has the best song in the whole game.
Difficulty? Well its like I said, it depends on who you choose to play with. Personally I never played with Morris except for a few times.
You should be able to finish this game in one hour. And there are two endings including a good ending and bad one.