Gorgeous George

[Linny]

Since he's proven sterile, I'd say the Mile is the option. It's not like they have a marketing issue. At this point, he's like a gelding, a money earning machine as a racehorse. He's not a dirt horse, why try him on dirt. If you want him on dirt, try the Mile(and 70y) Dirt. At least it's within his distance range.
The reason for trying him, seeing if you can open other doors, is to market a stallion as widely as possible. Proven form on dirt opens the door to US breeders, as Giant's Causeway proved. Now that the reason for such moves is off the table, run him where he can win.