I will have to get a pair of those cutters! - thank you for sharing those. I don't make a habit of burning it. I had a run of buying online and ended up with several boxes. One was large enough to house my chicks for a few days. Some went in the base of hugelkultur beds, most were put in the recycle bin once they were wet from rain and could easily be torn. The quality of cardboard has certainly gone up a few notches recently.
Those type of power cutters are sold by many brands. I would suggest looking for the best price on whatever one you buy because I think most of them are made in the same factory in China. They have interchangeable blades, so they seem to be standardized.
I bought my power cutters from Harbor Freight, on sale, on a weekend where I got extra free tools/supplies for making a purchase. Plus, I had Harbor Freight Rewards money to use up. I got a really good deal after all those discounts. I use my power cutters much more than I expected. I have not sent a heavy cardboard packing box to the recycle center since I got my power cutters. All my cardboard is recycled at home as deep bedding shreds in the chicken coop, then tossed into the chicken run, then the finished compost goes into my raised beds and grows food for the family.
My hands are getting old and I cannot use my big manual scissors to cut up heavy cardboard without cramping them up. Another option is to use a utility razor knife, but those are not nearly as safe as the power cutters. But if you don't have the money for a power cutter, then there are other ways to process heavy cardboard at home. I just find the power cutters, for me, was worth the purchase.
Just a small sample of other brands of power cutters...