Sentence:  But having lived with the disc for some time now , I find the performance less exciting than either Schnabel 's or Fleisher 's ( whose superb performance with the Budapest Quartet has still to be recorded ) and a good deal <WSD>less</WSD> filled with humor than Curzon 's . 
Meaning of the word marked with <WSD> tags:  used to form the comparative of some adjectives and adverbs