Dear Unique,
Masuk is the cream of the crop for reading the Zohar in line with the more widespread ideas of the Arizal. The Sulam is intended to read the Lurianic system into the Zohar. But both mix in many, many, outside ideas. And contribute to the common misunderstandings of the Zohar. Additionally, both translations are not wordy. One word will be used over and over, where the original uses many different terms. And, neither one understood Aramaic as a living tongue.
