Sentence:  Sophia broke down here. Even at this moment she was subconsciously <WSD>comparing</WSD> her rendering of the part of the forlorn bride with Miss Marie Lohr's. 
Meaning of the word marked with <WSD> tags:  To assess the similarities and differences between two or more things ["to compare X with Y"]. Having made the comparison of X '''with''' Y, one might have found it similar '''to''' Y or different '''from''' Y.