Looks like mloto likoma to me...In my experience with Copadichromis Trewavasae (aka mloto likoma), this is one of the more timid haps and will probably take awhile before it looks anything like this guy pictured here, and may not ever color up quite like this...
also, remember that the fish you saw pictured was probably the best looking adult male in the tank, possibly in a species only tank, and with females present...he will not always look like that, depends on a variety of different factors..give him some time, these guys are pretty slow to color up..they can also show a little yellow sometimes in the fins, but most of the pictures you will find online wont show that...
same fish different mood...