They both look washed out and its hard to tell when they do not show a good pattern. If you use the pics you have posted so far they have more female patterns than males. Males will have spots on the gill plates and over the entire body while females have the heavy barring and little to no spotting. I dont think jags will lay eggs at 4" but I could be wrong. One could be a male but so far the pics dont give a definite answer. I know my jags have changed allot in pattern as they grew from 4" to 11". My male wasnt a for sure until about 6". I will guess once he hit about 6" he became the dominate fish and started to show his pattern and became confident and started claiming tank territory.






