Either would work for me. I have trained with knives most of my life. During the academy we did a little experiment. The officer was supposed to draw his blue gun while I had a blue knife with chalk on the blade at arms length. Before he could get his gun out of the holster single retention by the way. I had cut both of his carotid arteries as well as his right femoral artery. He would have bleed out within seconds. I carry a Ka-bar TDI every day on my weak side hidden by my gun belt to stop gun grabs. On a side note I have been involved in a real knife fight and I did in fact bleed. It ended quickly when I front kicked him and broke his ribs he folded like a cheap tent but he did cut me. I still have the scar.
