They all come in paper sleeves like the albums and have booklets and bonus tracks.
The Madcap Laughs has the bonus track Rhamadam which was only available as a digital download in the past.
Barrett has Bob Dylan Blues in Mono which is new, and Dominoes (2010 Remix)
Opel has the 2010 Remixes of Here I Go, Octopus, and She Took A Long Cold Look
All in all by getting all three you end up with a very complete solo catalog from Syd Barrett.