That may be true but you won't get any normals in a super pastel x whatever breeding so there are advantages either way.
If you do go the Pewter route, I personally would shoot for Black Pewters (Black Pastel x Pastel)
Isn't there a possibility that the normals you did get would be Het's ?? Normal Het XXXXX ??
1.0 Normal (Diablo)
1.0 Platinum Lesser (Aurora)
1.0 Russian Blue Cat (Magnum)
0.1 House Cat (Porsche)
1.0 Australian Cattle Dog (Diesel)
0.1 Yorky (Mercedes)
2.0 Kids (Matt & Leland)
0.1 Wife (Jennifer)
No The wife and Kids do not conform to the Automotive type Names haha