Now with the latest pics i;m starting to lean more towards a fahaka than dwarf puffer as well due to the back two spots and the pattern design... he also seems a little more elongated compared to a dwarf puffer...
The last photo doesn't look like a dwarf...
This is weird. They come from different continents. The dwarfs may be captive bred, but a Fahaka would be wild caught. Maybe somewhere along the line, someone slipped a Fahaka into a group of dwarfs, but that should be a difficult mistake to make. Do you know where the shipment came from?
Either way, it should be obvious what it really is in month or so.