Lew opinions vary, but I won't mix products, I'll use stabil for longer term storage, and seafoam in day to day running as it has water removing, and cleaning propertys as well as stabilizing, but changing it up certainly can't hurt.
in my 4-stroke sled (yammy) i use the yamaha fuel stablizer and conditioner so far 4 years no problems and it's cheap at 5 bucks a bottle