I am running the Cambridge with no external DAC. I have not tried the Orchid with the Cambridge because, honestly, it sounds fabulous as is.
This is an apples/oranges comparison. You need to try the Cambridge with the Orchid with the same digital cable to make any assessments of the two as streamers. My guess is the Orchid is smoothing over the deficiencies of Spotify whereas the more neutral DAC in the Cambridge points out the differences in stark contrast. Just my semi-educated guess.