www.replacements.com is the best for things like this. They will list if like patterns are made by different companies. I hope this helps.

Is there a website that has china patterns listed with the "same" pattern by different makers?

It looks like the two mentioned above may be the same pattern, and I assume there might be other makers that made the same.
I'm looking for pieces for the Epiag Rosalinde pattern.
Thanks-