I strongly recommend you try these boots on various terrains before you make your decision. Personally I would recommend going up at least half a size. It allows for wearing them with hiking socks and for swelling in the feet while hiking. Other than that great boots that I highly recommend. I bought mine in the dark grey color and love the bright blue soles.
While on my video you will see me wearing some light cotton socks, I recommend wearing appropriate hiking socks with these boots (I wore the white cotton socks in my video only to show socks do not get wet when shoes are submerged).