AnyDVD HD has a UDF 2.5 file ripper built in. This keeps you from having to install the Toshiba UDF 2.5 drivers in Windows XP.
AnyDVD HD does not burn to disks. It is a decryption/ripping program only.
ImgBurn is a completely different sort of program. It can make image files, or burn files or images to blank media, including blu ray disks using UDF 2.5.