Roto Grip Clone vs Exotic Gem

Comparing 2 of Roto Grip's big asymmetric balls, the Clone and Exotic Gem. The Clone is Optitrax Solid with a ReactaGloss finish, while the Exotic Gem is MicroTrax Pearl also with a ReactaGloss finish.
Roto Grip Clone:
RG: 2.51
Differential: 0.056
Intermediate Differential: 0.016
Coverstock: Optitrax Solid
Roto Grip Exotic Gem
RG: 2.47
Differential: 0.053
Intermediate Differential: 0.016
Coverstock: MicroTrax Pearl