Thanks for the link. When I said a completely different colour, I understood the "suitcase" man's suit case was black (which to me, is a different colour than grey). The suitcase found in July I thought was grey. I personally don't think it would have faded so uniformly in the timeframe of a few months, especially over autumn/winter. I noticed also, that the cam videos were quite deceptive colour wise. On some shots, it appears blacker, on others, grey. Given the time stamp on the videos (which I don't know how accurate they are, but I am taking the timeframes directly before the "close up" shots, which didn't have date stamps on them, except for the - 24/5/2015, in which the suitcase appeared grey, the 12/6/2015 and 11/7/2015 appeared darker and blacker. I have since done some research on the net and found a grey Lanza suitcase similar to the one found (though not exactly the same design) which appears grey. However, in some further shots of the same bag that the seller took, it appears more black than grey. In other words, it appears the camera, lighting and sun/shadow have quite an impact on the perceived colour.
In any case, given the picture released by the police of the suitcase in which Kandalyce's body was found, the inner zipper stitching is grey. If it was originally black, I wouldn't expected it to have faded uniformly and consistently, given the zipper would have been closed for a period of time, or even if open, wouldn't all have been exposed, and the suitcase itself would have been moved around, meaning some surfaces would have been exposed to the sun, whereas others wouldn't. Given that, I'm still of the view that the suitcase was originally grey, and based on eye witnesses, the "suitcase" man's suitcase was black.
http://www.gumtree.com.au/s-ad/moun.../lanza-luggage-travel-carry-on-bag/1075207551