i would have to say no. but it really depends on your situation. I allow most of my ducks to free range, the little guys always get caught by predators never lost a big one. Alot of calls fly, well!! They are some of the coolest poultry!!!
Im going to have to say no also. They sure are cute but alot of bantams fly. that means either clipping wings or having a top to their pen. (if you do that anyway then i dont think there is anydiffrence.
I haven't had ducks for a long time but my bantams have been easier cause they destroy less when left to free range. My bantams have been not taken by hawks where my bantam chickens have been. Other than hawks I don't have much in the way of predators.
Like they said it depends on our situation, if you are going to keep them up then yes. they are small, dont eat much, and dont drink much, so there is less choring to do with Bantam ducks!
And pound for pound, bantam ducks make a lot less mess! Me personally, I'd always choose the little guys!