Lighter, yes, but not smaller. And not lighter if you factor in the weight of the circulator. The point is that when folks speak of the Anova being easier to store, they're generally leaving the box out of the equation.
More importantly, one of my reasons for preferring the SVS is that it's better suited to leaving out, i.e., not stored. As I said earlier, an appliance ready at hand is more likely to be used. And the object of the exercise, of course, is to use the darned thing, not just to have it.
Again, I'm not saying the SVS is the right answer for everyone. Nor am I knocking the Anova (I have one and like it).