Trojan horse or Trojan

I found Type of threat on Symantec web a little confusing, one of the threat name is "Trojan Horse", the type is "Trojan", "Downloader" type is "Trojan Horse"
"Infostealer.Banker.B" type is "Trojan Horse", "Infostealer.Banker.C" type is "Trojan"

Can anyone can explain the difference between "Trojan" and "Trojan Horse"?

http://www.symantec.com/business/security_response/definitions/rapidrelease/index.jsp

 

It's the same. mabe they just use that to give some name

 

Every AV suites show diff names for same viruses but in the end they are actually virus

 

Trojan Horse = Trojan = TR

 

Thanks for all your reply
They should be the same