However, when we compare the validity of two sentence alignments in different article alignments, SntScore prefers the sentence alignment with the more similar (high AVSIM) article alignment even if their SIM has the same value, while SIM cannot discriminate between the validity of two sentence alignments if their SIM has the same value.
sntscore is more appropriate than sIM if we want to compare sentence alignments in different article alignments, because, in general, a sentence alignment in a reliable article alignment is more reliable than one in an unreliable article alignment.