Definitely this one. The four subjects do not seem to know of your presence. The additional breathing room in the frame seems to add a scaling factor that reinforces that for me. And the fact that they are unaware is a large part of my overall interest.
The other version seems crowded to me in an unnatural way. If you were really as close as that crowding might indicate, while pointing a camera down at them, why is no one looking up at you? If I were one of them, I would be. It doesn't look as believable to me.