Yes it's the same. The baration horn is typically just called a baritone and it is a Bb instrument so it's the same as the calling it a Bb baration. Here is the basic description from [Wikipeda][1]:

> The baritone is part of the tenor section of a band. Its second
> partial with no valves pressed is **concert B♭** on the second line from
> the bottom of the bass clef (B♭2 in scientific pitch notation)

The baritone horn is a Bb instrument so it's exactly what you are looking for.


  [1]: https://en.wikipedia.org/wiki/Baritone_horn#Range