Ah, John, the original author compared the 9800, not the 9880, and he supposes that's not the case in the other 880 series but I'm quite sure it is. Of course the inksets between 800 and 880 are different. Regular Magenta K3 compared to Vivid Magenta K3.
Other differences for the 11880 I would ascribe to differences in head technology and half-toning etc.
Here's a view of 9800 vs 11880 on EFP_PK_2880 based on the Pixel Genius profiles (attached - 9880_11880_EFP_PK_2880.jpg) and profile information courtesy of
http://back.iccview.de/index_eng.htm . The 11880 is shown in wireframe and the 9880 in solid colour.
Description:
SP9880_EFP_PK_2880
Tags: AToB1 (Colorimetric)
Calculation: LUT with 35937 grid points
Header:
size = 2930500 bytes
CMM = 'APPL'
Version = 2.4.0
Device Class = Output
Color Space = RGB
Conn. Space = Lab
Date, Time = 2 Oct 2007, 18:36:29
Platform = Macintosh
Flags = Not Embedded Profile, Use anywhere
Dev. Mnfctr. = 0x0
Dev. Model = 0x0
Dev. Attrbts = Reflective, Glossy
Rndrng Intnt = Perceptual
Illuminant = 0, 1, 0 [Lab 100, 0, -0]
Creator = 'LOGO'
Total volume of gamut is 747498 cubic colorspace units
Copyright by LOGO GmbH, Steinfurt
Description:
SP11880_EFP_PK_2880
Tags: AToB1 (Colorimetric)
Calculation: LUT with 35937 grid points
Header:
size = 1798568 bytes
CMM = 'APPL'
Version = 2.4.0
Device Class = Output
Color Space = RGB
Conn. Space = Lab
Date, Time = 1 Oct 2007, 18:41:36
Platform = Macintosh
Flags = Not Embedded Profile, Use anywhere
Dev. Mnfctr. = 0x0
Dev. Model = 0x0
Dev. Attrbts = Reflective, Glossy
Rndrng Intnt = Perceptual
Illuminant = 0, 1, 0 [Lab 100, 0, -0]
Creator = 'LOGO'
Total volume of gamut is 758396 cubic colorspace units
Copyright by LOGO GmbH, Steinfurt