You MUST NOT buy hiking boots without trying them on. Period.
You want to hike in them - yet there are thousands of different foot forms and accordingly a lot of different boot cuts, differing in a lot more than only the length (which the size describes). There are wide and narrow boots, some with a high bumb under your instep and some with little and so on. There is no way of telling, if they fit for you or not if you don´t TRY THEM ON!
That said, the first link I found on google has a review that says them to be smaller and suggest ordering half a size bigger. Of course, you have to take into account how your old boots were - if you already bought them half a size bigger than normal (not unlikely if from the same company) then you probably don´t need to add to the size. However, only way telling is to TRY THEM ON!