I feel that I have to add my voice to the chorus in praise of the stockman pattern. It is a winner, no doubt about it.
That said, I have to state that I like the stockman's "pappy" even better. The "cattle knife", for those who have never seen one, most often looks like a SAK or Scout Knife (less the bail) that has the same blade selection as a stockman. Most cattle knives were about the same size as a standard SAK too, about 3 3/4" to 3 7/8", closed. (For those who are interested, Levine provides an excellent description of the wide range of variation in which these knives were made in the 4th edition of his Guide.)
To me, the cattle knife tends to carry "easier" than a "4-inch plus" stockman and it feels better in my hand when it is put to work because of its more compact and robust handle configuration. In short, the cattle knife carrys and cuts like a SAK that was designeed to be a knife rather that a pocket tool kit that comes with a knife blade.
It's interesting that even though my cattle knives are shorter than my full-sized stockmans I don't miss these stockmans' extra length when the cattle knives are being used. And, I for sure don't miss these stockmans' extra length, bulk, and pocket wear when I am carrying my cattle knives between uses. There is something to be said for nearly all equal-end jack patterns, in this regard, and this may help to explain the past popularity of such old-fashioned patterns as the sunfish and the equal-end jack, the current popularity of the SAK and the Scout Knife, and the resurging popularity of the canoe.