I am telling you right now, I get more meat with the electric and it is cleaner. Out of respect, I try getting all the meat I can when keeping a fish. With a regular fillet knife, sometimes that doesn’t work out too well because I hack the meat up more that have pieces that end up coming off and being wasted. That and I take forever and after a while I lose my stamina and start speeding things up just to get it done.
I am sure there are a lot of guys who keep a lot of fish and are hand filleting a lot and getting a lot of practice. Because I don’t keep a ton of fish, I am always out of practice. The electric seems to make up for it though by making things easier.
Even with the electric having 2 serrated blades, the edges come to a fine point. There is negligible tearing going on.
Like I said though, I am sure there are guys out there who are much better with a manual knife. I’ve seen it. But for me personally the electric works better.