These may not be the original sources for either shiTTah, but two early examples of either of them can be found in the Rambam, Mishneh Thorah - Hilkhoth Berakhoth 6:2 (mevorekh batteHiloh), and in the siddur of Rav Saadia Gaon, dinei berakhoth - ^amudh 88 (uv^aqav ghusl al-yadayin - wa-aHarei reHiSath ha-yadhoyim).
Essentially, the order for each method is:
- Rambam: fill cup, say berakhah, pour water, and dry hands
- Rasag: fill cup, pour water, say berakhah, and dry hands
My questions are: