Piccolo couldn't even tell which one of them were stronger until they fought. So yes he needed to visually see the 3,000,000-60,000,000 gap with his own eyes since he couldn't comprehend either power.[/quote] if you can sense it as big, you can logically sense who is bigger.... as has been done in the show countless times. he can't pinpoint it but clearly has a scope of itpiccolo clearly felt both their power levels and inferred frieza was stronger as evidenced when Goku used the kaioken x20 and frieza withstood it thus showing Goku and the gang frieza was suppressed obviously unless you ant to argue Goku couldn't tell? frieza was clearly doing short burst of his power and Goku fought he was bluffing
Hit fought kaioken x10 Goku and they were near enough matched, Hit came back in episode 72 and was way stronger than before and using a greater technique stated by Goku and hit themselves therefore Goku got over 10x stronger debunking your silly scale
i also don't think the writers are thinking about comprehension of the characters it's a statement made to imply they are close in power
countless times have people shows the difference in ki
Minute: 12
Context: Ginyu, now in Tagoma's body, powers up.
Kuririn: "H-He's so strong..."
Piccolo: "His power has risen even higher than before?!"
Jaco: "I see. He drew out that Tagoma person's full power. I guess that's the sort of person Ginyu is."
Minute: 9
Freeza: "Judging from the energy I'm sensing, it seems that I will be the victor, does it not?"
Goku: "I think it'll be a close match."
Freeza: "No, I am superior."
also if korrin a cat can tell who is stronger between Goku and cell, i am sure a experienced warrior like piccolo or a god like shin can comprehend power levels way above them. you are using one statement which really is just fluff frieza was oviously not above their comprehension as in sensing but just as in how strong they are is unbelievable