Hi Frank,
Mostly though when cleaning out through dadoes. Like a plow, I typically begin on the far side to establish a visual finished depth of cut. While the blade is basically laying in the dado, I am pressing down on the end of the chisel. It's not a great amount of pressure and they do flex.
I also have been known to quickly waste descrepencies between two or more mating boards with the chisel flat and flexing the chisel at the tip as it begins leveling across the grain. More control to me than a plane. In the Japanese tradition, this may be done with a slick or spear point jobby [I forget the name].
I also like the feedback sense. If I am paring a mortise wall, I can feel instantly if I begin undercutting by the flex induced by taking a thicker cut as the chisel goes down in hard woods.
The common issue between yours, the LN with long handles, and the traditional long paring chisels is the extended length over what are commonly called bench chisels. I think this, the length, is one of the biggest factors I mentioned which distinguishes relative merit over bench chisels for paring use. Second is the lower bevel angle...
There is also the issue of bevel angle mentioned above. Whether we are talking about vintage Stanley or modern LN, the lower bevel angle is important to me. Neither of those retain an edge well in hard hardwoods at a low angle. The Sorbys do fine, the HTs better still. I think also the thickness of the blade depends on what we consider paring: tissue thin or thicker slices? The thinness doesn't really come into play unless you are paring more than the lightest of slices. Combine thinness and low bevel angle and it is much easier to pare thicker slices.
To a great extent, it is summed up where I said, call me old fashioned. Read that as tradition. It is the same tradition which prefers straight-sided firmers in place of bevel-edge chisels for bench use. I never have liked the Stanley 750 style of chisel but do own some. I feel they are too short and uncomfortable on the guiding hand. Ditto other brands of BE chisels, regardless of tradition.
One thing I have never liked about Japanese chisels is the relative short blade section once one starts getting to about 13 mm and above. I feel I have to hold at the base of the handle to guide the chisel and it's too narrow for my liking.
As DC says, "As is so often the case I think the important factor is what suits the user and their style of work." As I can only speak from what suits me, those issues whether articulated well or no, are my perceptions of what I use and why.
Take care, Mike