OK, helpful it is:
Statues = awesome dynamic poses that will never be achieved in an action figure. But the paint apps on polystone are rarely, if ever, up to the same photorealistic standard as high-end action figures.
Action figures = offers more customisation options and greater variety of switch out accessories. But the relatively small scale means tailoring can be crude in mass production. Hence some custom-made 1/6 suits, for example, can easily cost as much as getting it done at 1:1, but some folks will pay it 'cause they're more convincing at that scale than what comes out of the box. And because they're a bit weird.
Statues = heavy quite often. Depending where you live, shipping can be a killer.
Statues - according to many statue collectors - are manly, the contemporary equivalent of the statue of David. Action figures - according to many statue collectors - are a stone's throw away from being a Barbie and girls will ridicule you for owning them.
Statues = quite often larger in scale they can have more 'shelf presence' - though 1/4 scale action figures are a good option where scale matters. Not too many 1/4 figures around though, especially if you're not into Batman or Terminator.
Other members can add to this list, or challenge some of my points.
At the end of the day it's apples and oranges. I collect action figures over statues because I appreciate the photorealistic aspect, the play value that comes from posing them and because space is a commodity where I live. But really... just buy what you like.
