Yes, they should both be HDCP compatible. The only difference is that HDMI if bridged with a sound card inside your computer can transfer sound through a single cable. Where as if you use a DVI cable, you will have to find a second cable for sound. I’d find it easier to just use a DVI to HDMI cable, and use a separate sound cable (most sound cards are surround sound for home theater), and find a 10 dollar 3.5mm cable to RCA composite cables (red and white). To answer your question…Yes the quality for video will be the same. Any questions pertaining to setting up a media center, give me a buzz, I have set my own up, and have helped many customers in my place of work to set up theirs as well. I work at a microcenter and sell anything my customers may want that we carry.