The Discus is a Tristimulus probe, as is the i1 Display Pro, so for accuracy on any given display you still need a Spectro to perform probe matching.
This is actually true of any Tristimulus, as the matrix pre-sets they come with are always generic, made from displays other than your own.
This is why FSI offer to supply i1 Display Pro probes to customers when purchasing a display that have Specrto Matching data for thst specific display, not just generic Matrix pre-sets.
But, the more expensive Tristimulus probes have better internal filters, etc., so are generically more accurate across different input stimulus ranges, which the results during profiling are more stable.
Steve
Steve Shaw
Mob Boss at Light Illusion