I saw a blurb somewhere that you are actually looking one step too low in the corporate ladder.
Rural King private label isn't made by Lumberjack, both Lumberjack, private label, other brands are made by the parent Lignetics.
Here is the Lignetics website:
https://lignetics.com/?msclkid=5f255494c63411eca03d25aa22ee5162
Other brands listed there, but not Lumberjack.
Now go to the Lumberjack website.
Check out the contact info:
Lignetics of Great Lakes, LLC
16592 W US Hwy 63 S
Fax:
715-934-4574
E-Mail:
ordersglre@lignetics.com
FOR SALES AND NEW DEALER REQUESTS:
Lumberjack Sales
Phone:
715-934-4573
E-mail:
ordersglre@lignetics.com
Even the domain name is Lignetics.
So I think what you have is the pellet version of Royal Oak lump production. Many many names, many recipes, many brands, etc.
They probably grade the wood/pellet source each run and see which line would best to market them under.
Are all pellets (or lump) equal, if they have the same manufacturer and parent? Of course not. Just like we have national bakers and snack manufacturers, doesn't make all chips or cookies the same. Different recipes and different brands, different price points and flavor profile, whether your talking pellets or cookies.