These do seem thinner than the older version 03325. Two main problems: 1) the perforations are not complete enough causing the boxes to bend when separating them and 2) they tend to crush when stacked more than four high. A plus: they are fairly easy to assemble just do it slowly!
I am putting stuff into a storage rental and these boxes worked out well. Easy to assemble held the books and papers that I was storing and stacked easily.