I think you must write to J&C to find out exactly what
this is. They start by saying it is an orthochromatic
version of PL-25, which is supposed to be similar to Agfa
APX-25, Panatomic-X, and similar films but then state it is
suitable for document copying and has extremely high
resolution. These two statements are in conflict. Films like
APX-25 and the old Adox films, are very fine grain, single
coated, standard contrast panchromatic films intended for
pictorial photography with normal developers. Lithographic
films are extremely high contrast in any developer and are
usually developed in solutions that make full use of this
effect. They are mainly used for copying line material.
There is a class of very high contrast, but still continuous
tone, materials used for various copying chores. These can
sometimes be used for pictoroal purposes with special very
low contrast developers. The description of this film makes
me think it is of this type. Both lith and high contrast
"commercial" films were made in all three color
sensitization classes although most of the high contrast
stuff was either non-color sensitized (senstive only to blue
light) or orthochromatic.
  At one time orthochromatic films were offered in all
types: they were popular for press work and for portraits of
men where the lack of red sensitivity brought out skin
textures.
  I could not fine any curves or other data on the J&C web
site but they may have them and can tell you what exactly
this is.

The product you mentioned would be more like the Kodak Commercial Film,
Freestyle markets a graphics art ortho litho film
http://www.freestylephoto.biz/sc_main.php?cat_id=2001 that would be more
like Kodalith.  They also market the AB lith developers.