Both are generally high quality.
I used to hit the San Lotano ovals pretty hard back in the day. Definitely a good stick.Can't go wrong with the San Lotano line, New World, New World Cameroon, Ramón Allones, Puro Authentico and Rosa de Guadalupe. Also the Southern Draw line (not under his label but made in his factory).
I started smoking cigars with the AJ New World Oscuro. These are still among my favorites. I do enjoy the Perdomo Champagne once in a while but full body smokes are in my wheel house.I'm a big fan of Nicaraguan tobacco and have only recently tried a Perdomo Lot 23. I've never tried an AJ Fernandez cigar, but am thinking of getting a sampler of either.
If you have tried either, please tell me what you thought about the quality and what you tried. If you have tried both, I'd love to know how you would compare the two, and what your preference is.