The the MacOS scheme of doing this leads a sort of organic, emergent window layout - I always end up with windows staggered to display relevant bits. With Windows (and with most window managers, X), things always end up either strict tiled or stacked.
I'm very used to the Mac way and prefer it, but that could just be the result of long use. It doesn't waste space (Windows apps always seem to have lots of dead space to me and makes me work to be able to see parts of other windows) and forces me to switch windows far less. But it is a fiarly subtle thing.