what is the difference between dvdfab vs anydvd hd?

DVDFab and AnyDVD generally have different strengths. DVDFab is great at file conversion while AnyDVD will let you play or copy any disk real time. DVDFab is overall the better tool between the two. I currently use AnyDVD to rip my files. For DVDs I use MakeMKV to separate the main movie or episodes. I then use tsMuxer to make it into a m2ts file if it will go into the permanent library. I used DVDFab for a long time but then moved to AnyDVD with the advent of BluRays. DVDFab is probably the best tool to convert ripped disks to a compressed format. It is probably a better choice for someone who doesn't want to learn the details of file formats and compression.