I don't have real wood, unfortunately. Aspen, pine, spruce, a wee bit of tamarack and birch, a wee bit of other woods, but predominantly aspen and pine. All of it is pretty easy splitting when it's dry. A knotty jack pine can be a *****, even dry. Though usually you can find a "fault line" for an easier go of it.
I always thought the fiskars stuff looked pretty good, but I have a better one of everything I have in fiskars. All of that stuff is 25-40 years old, like my old maul. You can't even buy a decent shovel in a hardware store anymore. Perhaps that is why folks think fiskars stuff is premium, idk. It is certainly better than the average hardware store stuff available today, but not better than the average hardware store tools available in the past. Most of my shovels, rakes, picks, pitchforks, etc, etc are commercial quality from years ago, so hard to find equals in a run-of-the-mill hardware store today. Impossible, in fact. I have broken the odd thing from being rough, but most have survived the farm for many, many years. I just drug out a couple of axes I hamfistedly broke a long time ago. One of them looks decent and deserves a new handle, I'd say. One day.
anyway..
my Dad had a splitter he called a "motor axe" haha that had two cammed wedges that opened when you struck the wood. That thing worked great, but sometimes was hard on the hands because it had a plastic handle, or at least that's what we thought. I don't think those are available anymore. I think some of those broke the wedges or pins or springs or something. My Dad's never broke, as far as I know and I don't know where it ever got too...