Yes a sharp blade will cut veins and arteries better then a dull blade. And there have been a lot of comparisons made on this topic.

But here is something to think about. When a surgeon makes a single incision, what do they do with the scalpel? Re-use it? No.

Now your broadhead needs to be sharp when it actually contacts blood vessel correct? But does it have to go through others things that can dull the blade before it gets there. Yes, it does.

So which will be sharper after penetrating hide, possible bone, and muscle to get to the blood vessels? A blade with finely stroped mirrored razor edge finish that can pop hairs from your arm,or a filed sharpened bladewhich has tiny serrations (can't see with naked eye) that can also make hair pop from your arm? There are many (well maybe not here) that feel the filed sharpened blades will retain their sharpness better.

I may actually trythe file sharpened heads this year.