Which of the 3 gaps is larger?SSJ2 Gohan vs FP Perfect Cell is likely bigger. Cell did a power up that pushed him so far beyond his limits that he turned into a bulky giant, far larger than what he did against Gr3 SSJ Trunks and still got stomped so badly that Gohan made him spit out #18, and then got "vastly" more powerful after his Zenkai and was still weaker than Gohan. Gohan was also holding back killing Cell too quick so he could torture him and make him suffer.
I don't think that was a large boost. I theorize grade forms become less effective as one masters the Super Saiyan state.Cell did a power up that pushed him so far beyond his limits that he turned into a bulky giant, far larger than what he did against Gr3 SSJ Trunks and still got stomped so badly that Gohan made him spit out #18