All EBs are made to the same specs. Unlike Wilson, for example, EB does not have two different grades of barrel, etc. The only difference between Browns is finish and detailing, blue, Gen III, stainless, checkering vs snakeskin etc.
The good news is that whatever Brown you buy will be the best made, best shooting model he makes. If you like the SF and its chainlink (I do), get that. Note that he also has the SF with a light rail a in stainless with the Gen III finish. He also has SF in Commander length available, with or without a bobtail.
Be warned, Browns are addictive, and late at night you can hear them in the safe saying, "Shoot me, shoot me, shoot me."