I found (I forgot the exact numbers right now) that the Merkur 34C and Gillette SS Flare-Tip were equal in blade-exposure. They don't feel a ton different in aggressiveness, but I would have to say, the Merkur 34C is definitely a decent step down in how close it gets, and I believe also in aggressiveness. You would have to try hard to angle the Merkur 34C at a more aggressive angle for it to cut as close as the flare-tip does while holding it at about the same angle. Hard to describe aggressiveness I guess, but it seems as if the flare-tip is a step up.
Is this something weird that I'm thinking it's more aggressive but most people think it isn't? That or is the blade exposure just one factor and other factors make the flare-tip more aggressive?
I literally use the flare-tip (still need to try the red-tip and adjustables though) to get a closer shave when I want to. Seems weird to me that when you think of "aggressiveness" people just look at the blade exposure and seem to assume the flare-tip has the same aggressiveness as the Merkur.