Same Toner Cartridge. 98X is UltraFine that gives your about 8K pages vs
98A that gives you 6K pages (Assuming 5% coverage). Either Toner Catridge
will work in your LJ 4 Plus. These two toner cartridges will also work in
the following Laser Printers:
HP LJ 4
HP LJ 5
Apple LaserWriter PRO 600, PRO 630, and LaserWriter 16/600.
I think a couple Canon printers too but I'm not sure which Canon Laser
Printers. Someone going to jump in here???
Dewaine