Those are not halligans, they're abominations that military and SWAT teams got sold because they're "tactical."
The original Hugh Halligan bars were single-piece, forged bars in the 30-32" range. After a few generations of Hugh's bars, Bob Farrell of Firehooks Unlimited adapted the Original Hugh to be even better. The forks were slimmer, with a better taper, and curved. The adz was likewise slimmed, shaped, and curved. This is still the same SPF Pro Bar in use across the world today.
Other companies in the 80s and 90s made versions of it. Iowa American Firefighting Tools made a decent one, but it was cast instead of forged. There were early Ziamatic Corporation SPF bars with very similar profiles to the Original Hugh, and later ones more like the FHU Pro Bar. In later years, even DeWalt made a SPF halligan. Now, there are at least 4 major manufacturers making SPF bars of varying profiles.
But along the way, a bunch of manufacturers like Zico, Paratech, and Blackhawk decided that profit was more valuable than quality, and they jumped in on the bandwagon. Problem is, their tools were drawn up by folks with no understanding of how the bars are used, or they would've never made them the way they do. Fat tool ends that can't get purchase; poor shapes that minimize leverage instead of maximize; cast tool heads; 3-piece bars with pinned or welded heads. Those inferior bars are barely cheaper than the real thing, but weigh pounds more and fail, either by making forcible entry harder or by breaking. I don't even call them halligans. They're fakes.