DVR questions?? (service provider- cablevision)?

I have cablevision io (the extended package with the movie channels) if that makes a difference at all. I was wondering what would be better for that **tivo** or **dvr for io** (how much is each per month)? What are the differences in price? In quality (how well does each work and up to how many hours can each record, does one do more than the other)? Thanks.