While Scott will be able to offer more of an answer, I know that j_williams here on bladeforums used to use a 5 inch regular Tusker as his go to woods blade. He also has his own forum on a well known bushcraft site because he does a lot of leather work, mostly for Iz Turley's blades. On that bushcraft site, if you search for Gossman, you can find a lot of posts by him about how much he liked his Tusker, which I believe also had a guard.
Speaking hypothetically, I think the Big Boar Tusker would still do everything you wanted, but it might be a bit more tedious as you'd be working with a larger thicker knife, so the finer work might be more tasking. On the other hand, with a Mini-tusker or Polaris, they'd both be a bit more nimble for finer work, but would't process wood as well ast the standard Tusker.
Hopefully some part of this is helpful.