Interpreting Model Output Probabilities

An engineer is working with two different text-processing systems. System A generates a story one word at a time. To choose the word at position i, it calculates a probability distribution over the vocabulary based only on the words from position 1 to i-1. System B is used for a fill-in-the-blank task. Given a sentence with a missing word at position i, it calculates a probability distribution for that position using all other words in the sentence (both before and after position i) as context. Which statement best analyzes the meaning of the probability distributions in these two systems?

Consider a model tasked with predicting a masked word within a complete sentence by looking at all surrounding words. The probability distribution calculated for this masked position has the same fundamental interpretation as the distribution from a model that generates a sentence one word at a time, where each new word is predicted based only on the words that came before it.