Genuine and Fake
Gooding #10F1. Head of Isabella clearly much smaller than on the genuine stamp. Letters on upper and lower tablets also slightly smaller and thinner. Genuine stamps with rings at the bottom left and right corners while they resemble squares on the forgeries.

Harradine - First Forgery

Gooding #10F2. Poor and thin letters on both tablets which also lean to the right. Color in bright orange as against vermilion on the genuine issue. The hanging ribbon that terminates on Isabella's neck is shorter.

Harradine - Second