I might be going off topic here, but I notice you said "fishing knife" and not "filet knife". I always figured that for me a fishing knife was likely to be a more general purpose knife more often than not that I was likely to carry when fishing and a filet knife was a special purpose subset of fishing knives that wasn't usually taken fishing (by me any way), but left in camp, or in the car, or at home for cleaning and preparing the catch after the trip. Since you mentioned Rapala I am guessing you are asking about filet knives specifically and not any of the more general purpose fishing knives.
I had been wondering about a general purpose knife to take fishing. I have had my usual folder that I carry every day, but what can I say... I like knives so an excuse to buy something to hang on my pfd might be hard to resist. I used to always have a Tekna knife strapped on the pfd and handy in my whitewater days. In theory it was a rescue knife. In practice it mostly spread peanut butter and sliced salami and hard cheese, but it looked bad ass

These days something specific to fishing might be interesting. On the other hand maybe my general purpose daily carry folder is the most sensible choice and something called a "fishing knife" may not be even as functional let alone more functional.
I guess "fishing knife" can mean something different depending on who you ask. A deck hand on a tuna boat won't answer the same as a guy sport fishing for panfish out of a canoe. An image search for "fishing knife" turns up an interesting mix of knives.
Any way I didn't mean that so much to nit pick about terminology as to wonder what kind of general purpose or everyday carry like fishing knives folks used.
Oh, on the original topic... I have never graduated to anything nicer than Rapala for filet knives and have been happy with them. As far was Mora goes, some of their general purpose models seem to have good steel at a low price point.