Here's a table summarizing the difference:
| Ukulele Type | Tuning |
| ----------- | ----------- |
| Soprano | g' c' e' a'
| Concert | G C E A|
| Tenor | D g B E |
| Baritone | D2 G2 B2 E3 |
The baritone ukulele's lower tuning gives it a deeper, richer sound than other ukuleles. It's often used for playing jazz, blues, and folk music.
So, to answer your question, yes, you tune a baritone ukulele differently than other ukuleles. You tune it to D2 G2 B2 E3.