They are Aulonocara, of which they are commonly called Peacocks. Yours are probably hybrids and are hard to impossible to identify exactly. Males get colorful, like the 2nd fish, which might get even more colorful as he grows. Females stay brownish like you 1st fish which looks poorly bred.
Peacocks don't always show good color with Mbuna like your other fish, as they are not as tough minded, but you might get lucky.