Need help IDing

Had this pair for sometime, and they have had some success at spawning, but I finally wound up with a very nice spawn a few weeks back, but I do not know what they are.  Ruby cardinals are the generic name, but that can apply to several specieis.
 
I am leaning towards Apogon imberis, but Apogon Coccineus sees like a reasonable match based on looking at pics.  I am not sure how to ID beyond looking at pics for these guys.