Drilling a fresh Nano and just found a really good deal on a NIB Zero Gravity so I bought it. Got to looking at the tech specs and for 14#, both balls have a 2.54 RG and .034 diff. Both also come 4000 grit from the factory. So....although the Zero is a mass bias ball, the intermediate diff is less than .010 which is almost so little to the point that USBC has said mass bias below .010 do not need to be marked on a ball....I wonder how much difference I am going to see out of the 2 balls. There is a slight core difference and the big difference is the IQ Nano has NRG and the Zero is ERG, which is the base for NRG without the additive.

I am going to drill them identical and leave them both factory surface for a comparison. I will report back on any differences I see.

Does anyone have both/had both and can provide any feedback?

Thanks Dozer. I like a few options with lower Diff (Loved the Visionary Ogres, Venom Shock, etc).

Agreed. In theory the NRG cover should make the Nano sooner and more even and the Zero should be a tisker longer with more move on the back. Essentially what Dozer alluded to in his post.

After throwing them, maybe a cover change to make some difference. Time will tell.