is flametail moka and blue regal cobue compatible?

[goldfishy]

I'm setting up my first cichlid tank and I'm considering an all-male setup. The two species I'm looking at are Aulonacara stuartgranti flametail mdoka and blue regal cobue. I've got them together now and they seem fine, but they're still young - the flametail hasn't colored up yet. I'm wondering if they're compatible in the long term. Do you think they're different enough, or will they be too similar once they mature?