Well I love to debate any Hulk fan on composit GZ vs Hulk myself in a battlezone.
Reason how GZ can and should pull wins.
1) Strength. Hulk is strong, but he still takes time to amp his strength. GZ on the other hand by Marvel comics is as strong as Classic Thor, Savage Hulk, and Hercules.
2) Healing and Regen. GZ as per the Heisei Movies and Millenium Movies has what is call G Cells or Regenerator Cells. In either case they grant super healing to the point of recreating damage brains, and body parts in seconds.
3) Durability wise GZ as per the new Legendary Series easily tanked the Asteroid that wipeout all life on earth in the past at ground zero with no damage. Tanked the 14 Megaton Castle Bravo Nuke (largest nuke used by america ever). Also Heisei Godzilla tanked heat attacks hotter than the sun as per the movie Godzilla vs Biollante.
4) Heat Beam is a major factor as I never seen Hulk tank heat reaching temperatures of the sun ever. GZ fire is pure pure radiation and heat as per most movie series. nuclear Fire reaches temps of the sun on avergae. GZ Heat can harm beings like Space Godzilla who was born in a Black Hole while tanking Exploding Suns! So its debatable how well Hulk can tank the best Atomic Fire attacks GZ is putting out. Even if Hulk absorbs the Rays, he could be BFR into Space by said attacks like Final Wars GZ did to Kaiser Ghidorah.
5) Nulcear Pulse is a ability GZ has that can easily BFR Hulk as the blast easily blew back 70,000 ton Ghidorah 1000s of meters. Its a AOE attack too.
6) Radiation absorbing is a big reason why GZ can win. As per Heisei series GZ can absorb Nuclear Plants worth of Radiation dry in seconds. Add to this this ability allows him to amp in power and regeneration. GZ went as far to absorb Fire Rodan entire body and matter to gain a huge amp. He even manipulated the star energy of Space Godzilla too.
So with this in mind, composite GZ feat for feat can pull wins IMO easy if not win more often than not.
I love to debate this out in a battlezone for sure
__________________ Too much work trying to figure how to size a Sig right to have one.