Trinidad, Panaque, or Something Else?

Little story: I got this little guy from my LFS after years and years of admiring pictures and spending hours watching them in videos and in the tanks at the LFS. I even got to petsit one while the owner was away for a long time. So I brought this baby home and adoringly named him Pico. One problem: I'm not 100% sure what species he is. Some of you may have seen other threads I've started and know that we're going through a bit of difficulty right now. But hopefully upon knowing what species he is, I can better help him out.