The more sections it has, then the more joints there are, and so stability is reduced (theoretically at least). Imagine having 1-section legs, it would be veeeerry stable, and also too cumbersome to move anywhere.
So the 4 section sacrifices a little sturdiness for a more compact package, and it'll also take a little longer to extend to full height. Whether you'll notice this in the real world is another matter though!
Personally I'll be going for the 4 section, as portability is more important to me, but if may be completely different for you!