The watchtower study edition is the organisation's primary brain-washing tool. So, of course, the language and phrasing used will be whatever they deem necessary in order to achieve their manipulatory ends.
So yes the study edition will noticably have language that appears more vitriolic and crazier to what is normally included in literature designed for public consumption. Note: the brain-washing / predatory reasoning in the organisations public literature is very subtle so it doesn't come across as harsh and as crazy at first glance, but it's still there.