A comparative analysis performed in 1994 by Albert Derolez (University of Ghent) and Nancy Netzer (Boston College) has revealed that manuscript A and manuscript B both date from the same period, that it is highly probable that both were created at the scriptorium of the abbey of Echternach and that they may even have been produced by the same scribe.
Komparativna analiza koju je 1994. godine proveo Albert Derolez (Sveučilište u Gentu) i Nancy Netzer (Koledž u Bostonu) otkriva da rukopis A i rukopis B potječu iz istog razdoblja, da je vrlo vjerojatno da su oba stvorena u skriptoriju opatije Echternach te da ih je čak mogao napisati isti pisar.