I love my zubat. That thing really tears through the wood. I suspect the tsurugi will have a little more flex, and I also expect it'll be more precise for pruning cuts, especially with the thin straight blade. That's less useful to me, but should be great for arborist work, especially when making tight cuts. While not ideal for my purposes, at $10 for silky quality, I think it'll do just fine.I actually haven’t used it yet, so not sure how it cuts but it’s been recommended to me. My latest Gomtaro blade is junk. Cuts really well but flexes and bends on the push stroke if you’re not careful. I wish I kept the old blade, it was much more solid and I’d like measure the blade thickness compared to this one.
I got an old Samurai Ichiban too that is a great low cost saw with impulse hardened teeth.
I have a folding gerber that has a blade that's supposed to be sharpened with a chainsaw file. I've had it >20yr. It cut great when new, but I didn't know what I was doing when I sharpened it, and now it cuts weird. Not exactly bad, but not as good as new, and definitely weird. That's from back when gerber still made US stuff, and blades are NLA, so I can't buy another one and do a better job of sharpening it. I can't remember what the blade's supposed to look like :^/