Future Warrior said:
So what do you think causes this distinction? Lack of ki control?
I'd say that'd somewhat be it. More precisely, a lack of experience in using it. Even prior to Super, it was clear Freeza wasn't the type to ever need to use anything close to his full power, which would make the effort of having to use 100% all the more great. In the Super manga Freeza seems to have lost this state entirely, which would fall in line with this as this is a Freeza that has finally put in the effort to train himself. Of course, the anime takes a different approach, though the anime's interpretation is full of far too many flaws in its usage by Freeza and Frost (why Frost never used it against Piccolo or Vegeta, for instance).