Da difference of sound between Grace

Anyone know da sound quality difference between da Grace f8 and da f9e or da f9e ruby??? Mahalo
I currently have and play the ruby. Great cartridge. I also have the 8 and regular 9 and have had them mounted in the same unit that currently plays the ruby. Yes, ruby is better if it is in top notch shape. As with all vintage cartridges, condition is every thing.