Taken from a second floor balcony, this is the atrium at the National Gallery of Canada in Ottawa. I was struck by the light and shadows, the colours and the discarded sheet of kleenex lying on the floor.
I think the other image is stronger. Compositionally, it's nice that the two kids and the kleenex lie on one line (more or less), but there's too much empty space around them. Also, horizontally they are rather centrish. I think a crop would be in order.
I like the fact that while the older child, pushing the pram (age + responsibility), is looking ahead, while the younger child's interest was caught by something off to the side (younger, fewer cares in the world, allows herself be distracted by her curiosity).
Still on an emotional level (sort of - I'm not good at this), the kleenex in the other pic had just been stepped upon. Here, it's just lying there. In both cases it's unnoticed by the people - but here, it's just ordinary ignorance, whereas in the other pic it's destructive ignorance. Or something like that, anyway.