not so much just in terms of absorbancy, but more so in terms of thickness, cos i like havin a fluffeh butt 
Rearz boosters are pretty cushy when dry, swell decently too.
Tykables Dubblers leave everything else in the dust. Super thick! also they hold a bunch and swell up to be freaking hooooge!. I’ve tried the Rearz, ABU, Bambino, Abri-form, and some non-ABDL boosters, and none were even half as thick. Rearz are maybe 1/3 the thickness of Tykables at best. The rest are all kind of super thin until they get wet and swell. Rearz may have the thickest diaper, but Tykables has the thickest booster by a large margin.
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nice!
I got some samples from North Shore and they were great. You have to make sure that the width fits your diaper.