I bought these two guys today. I thought they were the same in the tank at the LFS, however, their color seems slightly different and the second one may (or may not) have very faint bars...they seem to come and go. Thanks!
They look like Pseudotropheus Socolofi, Cichlids have stress bars which intensify when either stressed or showing dominance, Cichlids colours often change and lines/bars appear and dissapear depending on moods.