A yoyo cross section is a continuum and so it’s not quite as simple as saying its rim weighted or center weighted. The weight distribution occurs across the entire continuum which is why every yoyo has it’s own unique character.
The basic physics of a yoyo are solved. What isn’t solved is correlating the physics to particular play characteristics. One reason for this is that the play characteristics are subjective. One person’s “floaty” is another person’s “zippy”.
Have you ever played a yoyo and didn’t like it and then you try it again 6 months later and you you love it? This is an example of the subjective nature of evaluating the qualities of a yoyo in play. So many subjective factors come in to play including current emotional state, expectation and muscle memory of what yoyo you have been recently throwing.
Interesting stuff …