's definitely an improvement on the first blade 
(ROOT (VP (VBZ 's) (ADVP (RB definitely)) (NP (NP (DT an) (NN improvement)) (PP (IN on) (NP (DT the) (JJ first) (NN blade))))))
(ROOT (VP (VBZ ) (ADVP (RB )) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (JJ ) (NN ))))))