Both of these were printed with the same 4x5 negative. Van Dyke is on the left, argyrotype on the right. Basically the Van Dyke is a lot "warmer" than the argyrotype, but they both have nearly the same inherent contrast. They also both have a ridiculously long tonal range -- this is a very hard negative for conventional printing because of its contrast. I've found that a very dilute selenenium bath will cool off the Van Dykes and get them to look much like the argyrotypes.