User blog comment:Mohamed7845/Lumie Vs Ruby Who is Better/@comment-26140304-20150828134717

There's not much to compare between these two units, especially due to the fact that Lumie hasn't been released in Global yet and is under major discussion with the team on whether or not she'll ever become released. It's relatively similar to how units like Lawson Jewel God, Star King Nekky, Fire Princess Lyn, etc. were never released.

Now, if we're talking from a JP perspective...

Lumie is similar to Bestie in that her BB utility is relatively similar. Personally, I would choose Lumie over Ruby because of that. Additionally, Lumie carries the abilities that Ruby has, which shows her superiority in terms of overall utility.

In terms of stats, Ruby beats Lumie, overall. Lumie is only available as a Lord type since it is obtained by buying the Artwork book for JP only. Ruby has much higher survivability (barring Def) and damage output with her HP and Atk.

I generally prefer utility over stats, unless the stats deem to be a huge problem. That said, I would prefer Lumie. Perhaps, a comparison between Lumie and Bestie could be more suitable?