Not even real competitors. If anything compare the Zonda and Huayra versions to the equivalent hypercar series from Lambo, which is the Reventon-Veneno-Centenario-Sian-Countach line.
Reventon was Lambo's first hypercar, coming much late after McLaren with F1, Ferrari with F40, RUF with CTR, and Porsche with 959; but as an indirect competitor to Enzo and CGT. (I would consider SLR to be a grand tourer, not a hypercar.)
Huayra BC is a hypercar that should be compared with either Centenario or Sian.
Aventador SVJ is a supercar that sits in the middle between 812 Competizione and SF90 Stradale Assetto Fiorano (and even THAT is no longer a hypercar... it got that status revoked a few months ago).