The Saronni was a special model of Colnago, built in honor of Beppe Saronni winning the 1979 and 1983 Giro d' Italia races. It was a commemorative model, much like the Roger De Vlamaenk (RDV) Colnago bike of the period, which celebrated Roger's multiple wins of the Paris-Roubaix.
The Saronnis were typically made of Columbus SL. I have one and it is built with SL tubing. I don't know why the e-bay bike has an Aelle sticker. Either the sticker was replaced or later bikes were cheapened.
I think both the Saronni and the RDV were of a decent quality consistent with the contemporaneously built Supers. They were typically well-pantographed, and are, in fact, quite a bit more rare than the ubiquitous Supers.
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Jeff Pyzyk
Milwaukee, WI