The BluRay releases shifted the aspect ratio slightly. The original DVD release (and thus, the DVD-Rip) maintains the exact framing Director Michael Rymer intended in 2003. Purists argue that the DVD-Rip preserves the "headroom" and the claustrophobic framing that makes the ship Galactica feel real.
The DVD release included special features, such as behind-the-scenes footage, cast interviews, and a "making of" documentary.