Digital BW, The Print

Roy,

I have built "proofing profiles" using your 21 step grayscale for 
QTR.  They seem to do a very good job of simulating what I will get 
off my printer.  And, so do you new LAB spaces.  Thanks for your 
great work.

What is the difference between the two?  

I'm guessing that your LAB Matte and LAB Photo Paper profiles are 
generic profiles which eliminate the need to create proofing profiles 
with a specto and profiling software for those that don't have these 
tools or don't want to fool with them.  When I use either technique 
for proofing (checking the Preserve Color Numbers box) the results 
are nearly identical.  Both seem to give me great results.  The 21 
step proofing profile, of course, lets me see the actual color toning 
of the actual profile.

Just trying to better understand.

Thanks, Lou