Birch and Osborne (2011) use either Hamming Distance or Kendall's τ Distance (Kendall, 1938) in their metric LRscore, thus obtaining two versions of LRscore.
pORT incorporates precision, recall, strict brevity penalty and strict redundancy penalty, plus a new word ordering measure v. As an evaluation metric, pORT performed better than BLEU at the system level and the segment level, and it was competitive with or slightly superior to METEOR at the segment level.