Long cruise
The Handi and ultra Hunter, the only difference I can see is the stock (the ultra's are laminated). My 223 Ultra Varmint has "Ultra" on the barrel, but a 24" replacement barrel is probably the same.
The accessories catalog lists the laminated stock so it can be bought seperate as well. Mostly just a looks thing. My Ultra stock is checkered and the Handi's are not.
Personal preference is all.
The BC and target models are the only ones with a REAL difference. the receivers are color case hardened. Other than that and stocks, they too are the same. Barrels are all the same for SB-2's