RE2 is just like RE based on graphics(Graphics are a bit smoother), sound, music, control, and scaring the crap outta' ya AGAIN. There are different bonuses though! As are the characters and storyline. Bonuses, you can get a lot of of weapons with unlimited ammo, such as the Rocket Launcher, Sub-Machine Gun, and Gatling Gun as well! Bonus characters, Hunk and Tofu, sorta mini-games. And also, in this you play as Leon, a S.T.A.R.(Is it STAR, or STARS? I forgot...) checking out Raccoon city, but finds that the whole city had been dieased with Umbrella's Virus! Or play as Claire, Chris Redfield's sister. This game is great!
Once again, like RE, RE2 has little replay value, since it is a puzzle game.
RE2 is even more scarier than the first, with more zombies and harder enemies and bosses! A Scream-Thriller!