SSH vs. SFTP in WinSCP

I don't see any difference in using SSH and SFTP, in either features or performance when connection to my Debian box.
When would you use one over the other?
I get about 30MB/s using both.

WinSCP does not have any SSH connection option. There's SFTP option. SFTP runs on top of SSH.

Ohh...my mistake, I mean SCP! :-P
Now it all make more sense...somehow I read "SSH" every time I saw "SCP"

See also https://winscp.net/eng/docs/protocols