Replying to Sakanas in deep pow?

I just picked up a pair of Sakanas for this year. I ski in Whitefish, so we get a good amount of powder, and I spend most of my time in the trees. I picked up a pair of Blizzard Brahmas for when the slope is icy, or all chopped up as my wife likes to get out and night ski after work.

I have a pair of Magnum Opus that are 124 underfoot, will I need to keep these for big pow days or will the Sakana with the 150mm shovel be just fine on those days too?