Since it’s my birthday today, I thought I would do a bonus blog today!
This first appearances of the two Flashes leads to a major question. They stated more than once in the DC Universe that writers of Earth-1 comic books ‘tuned in’ on Earth-2 to know their names, powers, adventures and so forth. These were then printed as comic books on Earth-1. That’s fine for heroes like the Flash, who has a different name on each earth.
But what about the other heroes? If Earth-1 knew that Jay Garrick is the Flash, then why didn’t they know that Clark Kent is Superman, Bruce Wayne is Batman, and so on?