Great idea. Your post sent me on a deep dive to find out more about Romado.
Interestingly, although numerous websites say that Romado was the precursor to Brainiac, the publication dates are extremely close.
The Romado daily strip ran from April 14 1958 to August 23 1958 (source:https://web.archive.org/web/20100206075400/http://www.thespeedingbullet.com/daily/ep91_105/ep104.html) while Action Comics #242 is cover dated July 1958 - which the Grand COmics Database lists as on sale May 29 1958.
So the two stories published only a month apart!
I imagine the general knowledge is correct and that Romado was created first, but they were very, very close.
Anyone interested can see some sample of the strip via UK reprint at
https://lewstringer.blogspot.com/2011/10/superman-in-radio-fun.html