I feel that Rengar and Kha'Zix should be opposite in terms of dealing with their opponents

Everyone says that excels at killing squishies but was like that, especially when a target was 'isolated' now that Rengar is seeing more play everyone wants kha'zix to have the same effect as rengar but I believe that kha'zix should be better at dealing with tankier targets instead of squishies (because that would be cool wouldnt it? idk)