If you know how to sharpen one, the Dexter Russel or a bubba blade is good steel.
But those battery powered rapala knives are f’n handy.
I always hated sharpening Rapala fillet knives. I never could get them sharp as new. Sharpening is a big reason I like the DR traditional with traditional steel. I have only used the steel for years and a few swipes brings back shaving sharp. Being very thin carbon steel they sharpen extremely easily. Personally I would rather sharpen like that often than have a harder sharpening job less often. That's why I don't go in for expensive super steel fillet knives.