Original manga is equal weight to the new manga. Therefore what comes later supersedes what came before.
You don't seem to understand the latter part of my statement. That's why you still struggle with Piccolo vs Base Saiyans, because you aren't following logic.
Later sagas overwrite previous sagas and force new interpretations of the older material. That's what retcons do. You don't get to hold onto the retconned material.
Piccolo vs base Saiyans would be different because people take that angle with strong suggestions from the Boo arc. Obviously, the Boo arc would be capable to shedding light in anything half confirmed or implied in the Cell arc, as it's part of the main continuity done by Toriyama shortly after, with the same editor and the same team. If it ended in the Cell arc and no additional interview on the matter, most ppl would assume Ten was > Kuririn. But since in the Boo saga Yamcha made a clear statement that Kuririn was the strongest earthling, as far as the manga went, that'd be a sealed deal on any implications from the Cell arc.
... Not implications made from a manga that was written more than 20 years later, which already possesses many contradictions towards the original material. It's perfectly understandable to keep one's original interpretation, backed up by the original manga, over whatever the Super manga implied considering it isn't a work done under the same feeling the original work was produced. Even when it had Toriyama's backing, Toriyama won't always have the same views and fresh opinions and take on things he had when writing it back in the 90s. If even the author is not infallible, as an author can contradict his own work, it stands true for Toriyama 20 years later who admitted he had to reread the manga to be familiar with it. And even then, he left things pass like inconsistent portrayal from Goku admitting he was never one to listen to his master, which is contradicted by Roshi in the 22nd Budokai highlighting how one of Goku strong suits was his ability to always listen to advices. If Toriyama didn't outright correct scenes that did not remain true to the original manga's portrayal of Goku, he doesn't need to draw attention to specifics of power scaling either, like "you're making the kids too weak"... That just would be very unlikely to happen.
