The one in the back is the same one I posted at the beginning of this thread. The front one was purchased one week later from the same LFS only from a different shipment. I beleive that one is indeed different. The other two not pictured look more like the front one and were purchased at the same time. Will try to get a side by side comparison photo thing when I get a chance. We need a taxonomy geek in here!
its like bristlenose plecs. if you want to get a pair, its best to get them all in the same batch, because if you cant really tell, chances are higher they will be the same sp.
actually its a small chance. unless your buying from a person who is breeding 2 plecs and selling them. theyre usually either wild caught, or bred at farms (depending on the plec)