In this video, Dustin James demonstrates the Katanaboys 500, 650 and 1000 cutting various logs. There is also a non-cutting demonstration of a Bigboy 360 (the straight not the more effective curved blade model) the and Pocketboy 170. Dustin's main interest seems to be in building wood shelters, and for that purpose he ends the video by recommending a combo of the Katanaboy 500 and the Bigboy.
For clearing big logs on portage trails, which I've never done, I'd probably go the extras dollars for the extra length of the Katanaboy 650. The Katanaboy 1000 seems unwieldy to tote, plus it's really expensive a
@Erica has posted.
I use my Bigboy 2000 (the curved model) for anything 3" - 5" on my property. It could be a very reasonable canoe companion. But for what I do on canoe trips—some minor site clearing and firewood processing—I can do perfectly well with my smaller and lighter curved blace Ultra Accel 240.
I limb small branches with my Condor Mini Duku parang (10" blade), and I baton split my small diameter firewood with the parang or my Benchmade Bushcrafter 162 knife (4.4" blade).