Hmm yea that's also possible. This still leaves the question why Redclaw would be more reputable to an arguably better sharptooth. We also don't have any time frame of when Redclaw gained his notoriety, whether it could have been before or after Plate's death. Another possible reason is the fact that he teams up with fast-biters to hunt his prey. The first movie showed that more peaceful leaf-eating dinosaurs even had trouble working with other species. Such an unorthodox method in the Mysterious Beyond probably catches other dinosaurs off guard and certainly would stick out in someone's mind.
Come to think about it. A conversation between Chomper and Redclaw would be kinda cool. I liked the conversation Chomper had with Thud in the TV series. It could show some parallels between Chomper and Redclaw. Both are doing similar things, with Chomper befriending leaf-eaters and Redclaw teaming up with other sharpteeth species.