- ISO - I'm using this only which software that doesn't have protection and doesn't contains MultiTracks (data+audio)
- BIN - This is 1:1 raw copy sector by sector..I'm using this when I've to make image together with Data+Audio tracks (MultiTrack CD) and supposedly some kind of protection.
- MDF - Don't know this one
- NRG - Exploring it yet and it seems to be good as it can hold MultiTrack CDs
Depends what you want to achieve...I thought the same until the day when I'd tryed to convert bin image to multitrack iso image to gain on space saving... The format is one of the better because it doesn't contains those extra infos but unfortunately you can't convert directly from bin to iso which contains multitrack iso images like Data+Audio.. Of course it's always possible to make custom Mixed mode CD that contains Audio+Data....Here's there is no any limitation but this CD will not contain any protection data...
Here's the answer:
What is BIN files? BIN files is one of CD/DVD image formats. BIN file is a binary copy of an entire CDs/DVDs disc. BIN file contain ALL the data stored on the original disc including not only its files and folders but also its system-specifics information, for examples, bootable information, volume, volume attributes and any other system-specific data. Actually, BIN image file is not a collection of files or folders but is an exact duplicate of the raw data of the original disc, sector by sector.