Very difficult to I.D. agreed. I went into the local Pet Smart looking for SAE's and they had Chineese algea eaters. When I asked the manager if they had true SAE's she told me there was no difference. Only a couple of inches, some coloration, and some serious agression issuses, or so i've read. I've found true ones here in my trusted mom 'n pop lfs, at least I'm pretty sure.
What an ignorant shop. They're in a completely different family.