I wouldn't. While Colossus may not be as strong as Gladiator, his durability is legendary, allowing him to go toe-to-toe with Glads. I also assume the longer the fight went on, the less confident Glads became. Nonetheless, Colossus is a top-tier character when it comes to strength and durability.
But yea, Wonder Woman just outclasses him here. I can't argue that one (as much as I want to).
A step below is what WMan is to Thor and WW is to Superman.
I dont consider 616 Colossus to be top tier if we are talking about the -same group- where Hulk and Thor are.
If hes able to lift hundred of tons or close? Sure. But you dont have to be in Hulk`s group to do that.
Colossus is probably my favorite muscle guy. Well, Him and Ben Grimm. These two are probably the best fighters of the muscle bound brawlers, but that's about it.
Strength Level: In his normal human form Peter Rasputin possesses the normal human strength of a man of his age, height, and build who engages in intensive regular exercise. As Colossus he can left (press) at least 70 tons under optimal conditions.
however if it was ultimate colossus then ultimate Colossus has the ability to transform his body from flesh and blood into an organic steel, giving him superhuman strength and making him impervious to harm. Supposedly his power has not yet fully developed because of his youth. Ultimate Colossus possesses vast superhuman strength, the limits of which have not been revealed. Colossus strength is sufficient for him to battle, and defeat powerhouses such as Thor (Ultimate), Iron Man (Ultimate), and Magneto (Ultimate), placing his strength well into the Class 100 level, being able to lift in excess of 100 tons with relative ease. Truly, only the Hulk (Ultimate) seems able to match the Colossus immeasurable physical strength.