I there a hierarchy / ranking on how strong skills are vs. each other?

For instance, I have both Angelic Nova (large) "AtkStr and DefStr of all allies is ^ significantly" and Big Gun Mania (large) "AtkStr of all allies is ^ significantly." Are they both "significant" the same, or is the Big Gun Mania going to give you a better result on offense?


I know theres a fat chance of a quickly reply since this thread hasn't been touched in 11 MONTHS, haha, but you never know..