Current crop of silver gelatin enlarging papers - preferences?
While condenser and diffusion sources certainly produce different levels of contrast that would be the hard way to go about it. The usual way of varying contrast with graded papers is with divided development. You have a tray of a relatively contrasty print developer, say Dektol or Bromophen, maybe a little stronger than usual dilution, and a tray of soft developer like Selectol-Soft - Freestyle sells an equivalent of Sekectol-Soft. Then you divide development between the two to achieve different contrasts between grades. Both Barnbaum's book and Adams' The Print (and presumably others, I haven't really delved into my copy of Way Beyond Monochrome yet) go into this in more detail.
Originally Posted by Richard Jepsen
VC papers are more convenient and allow burning areas with different filters but it isn't too hard to get intermediate grade contrast from graded papers.