I gave SDK's a shot for overnight wear but I always hit their limit and then some. They seem to be substantially lower capacity than space/simple/paws. Their rated capacity of 4,500 (vs 5,000) looks like it should be closer to 3,000 from my experience. Definitely not enough for overnight for me.
And those numbers seem high anyway. 5,000mL is over two 2-Liters. Think about that for a bit. That's completely unrealistic, and rather annoys me when I see any diaper manufacturer quote numbers that are just so far beyond reality that it feels like they're insulting my intelligence to think I would believe that. I've soaked space all the way to the back line to where they were leaking, and when I took that diaper off and rolled it up, it was only slightly larger (in volume and in weight) than a single 2L.
But they all seem to do it so there's no point in singling any one out.