its a weeksii. the head is much wider than a senegal's head. you can kinda see some patterns (stripes) in the reflection in the 3rd pic. i wouldn't say its colored like a senegal. its just that for some reason the color lightens and its stripes faded as it grows.
i've been to the person's site who i presume owns this bichir...he had like 40 pics of the fish since juvy. i don't remember the site and can't find it at the moment, not sure if its the same site you went to. if it is, the owner probably consolidated some of the pics...i think i have saved some of the earlier pics on my comp, i'll find them and you'll see. but in the meantime, its without a doubt a weeksii just from the pics you posted alone. its head tells all.