Refering back to the initial thread as I haven't been over here in a long time, the main advantages that I see between the IRIQ(&derivatives) and the Pronto are:
Better backlighting
Easier readability
Full graphic programming via prontoedit(very soon)
Custom programming for "power users" as well as basic needs users
With this in mind, also being a Madrigal dealer, wht more can I say...Call it what it is.