As much as reasoning and logic "should" decide Gladiator the winner it just ain't going to happen. Surely glad has more versatility, intellect, and battle tactics and skill to defeat the hulk but like I've already stated Gladiator is just too supermanish to beat Marvel's top-tier..
You must remember Glad was made to mock Superman and if you really think about it, Gladiator has never "really" beaten down a Marvel impact player such as Spiderman,when I say defeat I mean just simply comes in beats this character down with the quickness and jet it..comic over...it seems Glad is "always" defeated in some form.
Now recall his previous battles with Thor, he did indeed have Masterson beat BUT by some instance Thor calls on an outside force(living lightning) resulting in Gladiator getting toppled, same with cannonball, although cannonball didn't really phase Gladiator with his absorbing blow he still sent him flying whilsdt Gladiator just ignored him and never really "showed" us he could have crushed Cannonball with one blow. Let's not even go into this hulk battle, I agree that they indeed made Gladiator out to fight like a mindless idiot, not utilizing his speed at all and what for?? to contribute to the make Gladiator lose just so fans can somehow "reason" Superman losing in the same manner foundation..Don't be surprised if Juggernaut, Magneto or Apocalypse make Gladiator look a fool in comics to come...Don't put your chips on Gladiator because he's a character designed for lost..Every now and then he'll have some stalemate here and there but he "never" really wins a one on one brawl..
Face it, I actually "like" Gladiator as I feel he's a cool(although rip-off) character..If Superman could own most of these heroes then so could Gladiator BUT since marvel has Gladiator as a mock character you're going to be forced to see him outwitted, outmatched and clobbered just so Superman could look like a fool, its a damn shame Glad has the potential to be a kickass character...I can almost "guarantee" you he'll never really beat down a impact player character not even the obviously weaker ones such as Spider-man or Cap'n America..