Digital BW, The Print

I have read that the 4800 is "linearized" in production, i.e., to tighter
tolerances, whereas the 2400 is more of a "consumer" product.  So far I have
not been able to determine what this means in practical terms.  I don't mind
springing the extra money for the 4800 if it has inherently better image
quality, although I don't print much larger than 10x15, which lays well on a
13 x 19 sheet.  As of now I am using the 2200 with UC inks and IP6 for b&w.
I would probably get IP for a 4800 or 2400, though some of what I have read
calls into question whether a rip is really needed for b&w, at least with
Epson papers.  Any experience is appreciated!

Ken