Captain Cadaver said:
That doesn't necessarily prove it to be referring to the highest level he displayed at that point. By that logic, we should use a similar statement to prove Dabura ~ SPC despite all feats pointing to a different conclusion.
It's very clear cut on the matter. It says that Birthing Cell Juniors makes each single Cell Junior equivalent to Cell himself. It would mean these Cell Juniors are equivalent to the Cell who slapped Gohan around. Cell powered up to full power as soon as he saw Gohan destroying the Cell Juniors, yet that wouldn't be a good material to judge Gohan's power if they were Vegeta's level, since even Goku who Cell didn't even get serious much with him is beyond even Grade 3 Cell. The fact that Cell powered up to full power after seeing Gohan one shotting the Cell Juniors means that they were no easy business.
Daizenshuu 2 says they're equal to Vegeta and Trunks, but Daizenshuu 7 says they're equal to Cell himself. Since Daizenshuu 2 is contradicted while Daizenshuu 7 isn't, this automatically means that this statement holds firm. Vegeta's final flash failed to do shit to a Cell Junior in Dragon Ball Kai, yet his normal power is supposedly stronger than 50% Goku post ROSAT. To say that these Cell Juniors aren't equal to Cell himself who slapped Gohan would be just disregarding Daizenshuu's uncontradicted statement.
Dabura is equal, if not far stronger with Magic than, Cell. I'm not sure what's wrong with using that statement. Clearly every guide says Cell is equal to Dabura, Gou supports it, and Feats also do as well. Feats point towards Dabura (with magic) > Dabura (normal) = Super Perfect Cell.
Vegeta and Trunks (and to a lesser extent, Piccolo) being able to hold their own even after Cell gave the order to kill isn't something that would happen if each one was on par with their dad.
They were actually playing around. He gave them permission to kill, but that doesn't shut down their morals. Cell even tells them to stop fooling around to push Gohan, and yes they were because rather than killing them, they were dragging things out such as kicking Yamcha for giggles, and slapping Goku around for no ultimate reason:
A character holding his own against someone who's astronomically above them is something that isn't new at all in Dragon Ball and shouldn't be used as a reference to suggest something in a debate unless there's an intended context behind it.
They may have taken time to regrow to their full strength and wouldn't be in a situation where they absolutely needed to gain Zenkais. Even if assuming they were, it may be their father's broken skillset wasn't fully inherited, considering we never see them use any of his techniques outside of the anime.
That's not how Zenkais happen. Just because they took their time, doesn't mean they won't receive a Zenkai. They were in almost same situation as Cell since they were mostly vaporized. Also Zenkai isn't a technique or a skill. It's a natural ability inherited. Cell has them, and these are his children. This is his way of having childre, and to say they don't have his natural abilities would be outright headcanon and illogical at that