The order of the beginning of Puskei Dezimra (weekday Shacharit for purposes of this question, although the structure for Shabbat / Yom Tov is similar with additional Tehillim) differs between Nusach Ashkenaz and Nusach Sefard
Nusach Ashkenaz:
- Mizmor Shir Chanukat Habayit (Psalm 30)
- Baruch She'amar
- Hodu
- Mizmor Letodah (Psalm 100)
Nusach Sefard:
- Hodu
- Mizmor Shir Chanukat Habayit (Psalm 30)
- Baruch She'amar
- Mizmor Letodah (Psalm 100)
Why the difference in the order?