I have a similar setup in .44. Neither are what I'd call "concealable" - even under a coat in a shoulder holster. However, since you used the "D" word, practicality sides with the Redhawk. While a SA is surely better than nothing, the DA wins out in the event a quick follow-up shot is needed.

I'll add though, it takes some practice to accurately unload a DA Redhawk. The .45 will still get your attention.

But, I'm glad I have both. I've used them deer hunting and they've both been fine at under 100 yards.