Page "Amram Gaon" Paragraph 10

Conversely, the Seder Rav Amram, so edited, was a major source used in the standardization of the Ashkenazic rite, which was already akin to the old European family.

For this reason, to a modern reader the wording of the Seder Rav Amram appears far closer to an Ashkenazic than a Sephardic text, a fact which misled Moses Gaster into believing that the Ashkenazic rite was based on the Babylonian while the Sephardic rite was essentially Palestinian.