Wayne is correct...the differences are subtle but the Vivid Magenta expanded the color gamut in reds/magentas which, depending on the image could be noticeable. And yes, the dithering (screening) was improved a bit. So, the 3880 was a subtle but useful upgrade over the venerable 3800. If you've been happy with a 3800, the 3880 is as good, and just a bit better. But unless your 3800 is dead, upgrading to the 3880 will only bring a mild improvement in print IQ.