No clue, really. I don't recall reports of problems with the Sodbuster and Sodbuster Jr.
I don't know the various Case Stockman pattern numbers, which are large vs medium, or two spring vs 3 spring.
I have seen on Case's website their accusation "blade rub goes with the pattern" regarding the two spring three blade stockman, and they won't fix the blade rub issues on their two spring stockmans under warranty.
(Strange that. My two spring $9.⁹⁹ shipped plus tax Rough Rider/Ryder stockmans, and slightly more expensive two spring BTI Old Timer 858OT and 858OTB Lumberjack stockmans, and vintage 1978 to 1986 two spring Schrade Old Timer 858 (no "OT" in/on the tang stamp, but it does have "SCHRADE +") Lumberjack Stockman, and GEC 828318 Dixie Stockman, also a two spring, all lack blade rub.
If the offshore produced Rough Rider/Ryder that retails for call it "$10" to call it "$19", depending on the series, can be produced without blade rub (again, all are a 2 spring) ... Why can't Case make a two spring Stockman (in PA, not offshore) that retails for 4 to 7x as much as the Rough Rider/Ryder, without blade rub?)
I've never seen or handled a Utica or Bear and Son stockman, so I don't know if they have blade rub. I don't remember the shell construction Imperial and Colonial stockman I had as a kid possessing blade or liner rub either. If they did, it didn't affect using the knife, or making one or more blades harder to open.
Anyway, because of Case's stance on the two spring having blade rub "going with the pattern" and their refusal to make it right under warranty, I strongly recommend getting one of their three spring stockman, or a Buck 301/303 stockman. The Buck are a 3 spring, but are no wider than a two spring.