I use both and love both. The Futur could probably be as agressive as the slant, but I haven't really felt the need to turn the Futur up past 3. There's much further it can go. My experience, though, is that it's a different kind of agressive. The Slant is like Jean Claude Van Damme agressive while the Futur is more of a Jet Li agressive. On days when I really want to feel like I've had a really close shave, when I want the aftershave to have that extra sting, I'll use the Slant. On days when I just want to feel clean shaven I'll use the Futur.