Depends on how dull that knife is! Box cutter produces a small clean cut, with little tissue damage that might not even bleed much. A dull knife produces a large ugly wound, with lots of tissue damage and blood! That is why my Boy Scout Master always insisted that we keep our knives, hatchets and axes sharp! I would recommend bringing a gun to this fight!
Although I don't advocate the use of box cutters in resolving interpersonal conflict, it would be a mistake to under estimate the lethality of a box cutter as an offensive weapon. Box-cutter killer found guilty of killing Amy Humphries of Orange City Killing of Satomi Mitarai - Wikipedia US teacher Colleen Ritzer was 'killed with box cutter' Husband cleared of murder for killing wife with box cutter Sources: Teen followed Danvers teacher into bathroom, killed her with box cutter | CNN
Years ago I was at a knife show. A kid about 20 picked up one of my knives and was flipping and twirling it like a dumb ass and asked me what the best knife was to have in a knife fight. I told him a 12 guage pump.
Arguably, that may be so, in some circumstances, if one actually had a loaded 12G pump at the time and place it was needed. Shotties are such noisy things if one uses it other than as a club.
Give me a knife to increase the distance between you and your foe Then you don't have a knife fight, you kill the other guy
Knowing what you're doing with any edge is what makes the difference. A novice is more likely to cut them selves than damage their opponent. As one man put it, "you fight like you're afraid to die". The brachial artery and carotid artery are surface vulnerable, if you know where they are, even a short scalpel can sever them. Some hunters prefer neck shots on game rather than the chest cavity. Game tend to blead out quicker, they say.