Here's where serendipity comes into play.
Castlevania games are known for their soundtracks. Encore of the Night features Symphony's soundtrack, making it a perfect companion for my NC300B Headphones. Even without my supped-up ears, Encore sounds amazing. Aside from the soundtrack, Encore also features sound effects from Symphony. The only major change is voice work. Though scarce, it sounds good -- at least compared to Symphony.
Most of Symphony's visuals accompany the audio. With the exception of blocks, nearly everything is pulled directly from the game. The sprite-work is sharp and really stands out on the iPhone's display. Although you'll spend most of your time watching blocks, it's neat to look over and see Alucard delivering a few powerful blows to familiar enemies.