That depends - is the 3.157E+04 (g mm^2) yoyo pink?
I think these are potentially useful numbers for designers but there are too many other factors that can have a profound impact on how powerful a yoyo feels. If you take that same MOI and put it on a D bearing yoyo it’s going to feel radically different. Likewise, if you use a thinner or thicker string.
It’s simpler for the ad copy/description to state whether it’s rim or center weighted. I imagine that a lot of companies wouldn’t really want to publish the MOI anyhow.