As it 'appens, chaps and chapesses, I have a couple of Robert Sorby paring chisels, and three Henry Taylor ditto. Not recent production - these date from the early 1990s (bought when I had more disposable income than knowedge of what tools I really needed) but I doubt they've changed much.
The Sorbys do have quite fine lands - between 0.5 and 1mm (about 1/32") at the cutting edge, and gradually increasing to about 2mm at the shoulder. Not as fine as some vintage, or Ashley Isles Mk2 bevel-edged, but pretty fine. The blades are also thin, and have quite a noticable spring, which is useful sometimes when a bit of delicacy is needed in paring.
The Henry Taylors are rather more solid beasts altogether, about twice the thickness of the Sorbys, and with much thicker lands - about 1/8" (3mm) on the 1" chisel, and about 1/16" (1.5mm) on the 1/4" chisel.
Neither make take quite the edge that my mid 19th century 1 1/12" I Sorby (no Mr Punch mark) takes, but both are perfectly respectable when used within their limitations. The Taylors would be better for someone wanting a 'heavy' parer for jobs like wooden plane beds, the Sorbys are better at really delicate stuff. Of the two, the Sorbys have slightly the better balance, being very light in the blade.
If I'm honest, I could probably do without them (oh no you don't - hands off!), I can't recall many occasions when I've 'needed' a paring chisel because a normal b/e won't reach. I still wouldn't part with them though - especially the I Sorby, which I inherited from my grandad (and it wasn't new when he acquired it!)
