They both work as long as they are sharp. Use what you want. If debating bleeding facts, the post a couple up is right on. Scalpel sharp bleeds better and clots least.
Of course. . if the deer is dead in 15 seconds, not much clotting takes place.
Why would a surgeon use something that won't heal up (clot) as quickly ? Well.. it is easier to clean and care for (less microorganism concerns), it cuts cleaner and easier, and so, more precisely, it leaves less scaring (important as hell for most folks) and remember. . . doctors have a tendency to sew up the wound after they are finished, so natural clotting, closing and healing is not as much an issue.
Again, both work and lots of critters have been very well killed using both ways.
ChuckC