How to tell the difference between Synodontis eupterus and velifer ?

try www.planetcatfish.com and maybe you'll see some good pics...
"Alan Silver"
wrote in
message ...
Hello,

We have three catfish, sold as Synodontis velifer. I have just been
searching the web for info on them (as they have grown rather larger
than the LFS said !!) and have discovered that Synodontis eupterus look
almost exactly the same.

How do I tell which I have ? Any links, with images, would be greatly
appreciated. TIA

--
Alan Silver