All the Floodland CDs have bonus tracks of some sort. The original pressings came with Torch and Colours as bonuses.
Here's what you need to know:
Original EU/USA/JPN CDs all identical masterings. The CD sounds good, mastered by Zal Schreiber at Atlantic Studios. Not the last word in fidelity and a little 'crisp' on top, especially on all that rubbish digital reverb, but it's certainly the most authentic way to hear Floodland digitally IMO.
2006 Rhino remaster: Good sound on the whole, especially if you like smiley-faced EQ, but one major failing is that Rhino simply used the same old Sony digital master tape rather than going back to the analogue masters and making a fresh A-to-D transfer. Emma, one of the bonus tracks, suffers from over-compression.
2011 JPN SHM-CD: Rubbish.
2015 Rhino remaster high-resolution: Excellent. If you're set up for lossless downloads this is the one to get. Fresh transfers so the issues with old A-to-D conversion is gone, dynamics are preserved and the sound is a tad smoother than previous attempts which helps with the ageing production. Short of Mobile Fidelity releasing a digital version of their incredible vinyl remaster, the 2015 Rhino is the winner for sonics.
If I were you, I'd pick up an original 1987 CD for authenticity, and supplement that with the new high-resolution remaster