Don't know if I will be explaining this correctly, but I'll give it a try.
If you know the chords for a baritone and you are looking at the chords for a song in soprano, what you play on the baritone will be correct.
Chords and tabs are a little different though. If you have the chords and lyrics for instance it will tell you to play C chord, then switch to F, then switch to G.
You would be playing this correctly.
If it is actual tabs (check out some of aldrine's videos on how to read tab), it is not telling you what chord to play. A tab tells you which string to play and where to fret that string.
Tabs are very good for solos, songs that show chord progression are good for strumming and sing-along.
If everything was written in tab, what you play will still sound fine, but if you are singing it will be in a much lower key.
The biggest problem will be if there are songs you look at for a soprano that show chords for part of the song and then show tabs for a solo. When you start the solo you will be in the wrong key. You can play the chords and it will be correct, but the solo will need to be transposed to sound correct or possibly rearranged.
If a tab shows the A string(highest string in pitch) at the 5th Fret, a baritone played on the highest string(E string) would be the same note.
Hopefully this makes some sense and doesn't scare you too much. I'm sure someone on here with a little more knowledge than me can explain it more clearly.
I play my father's Beltone baritone a lot and I've always run into the same problem. Cool thing is if you look up a guitar tab and it is a solo on the four highest strings, that is what you have with a baritone, so you can use a lot of guitar tabs.