They are the same as an Expert - yes true, in the early years.
The latest Scudo's are still built by Fiat but now use their own Multijet Fiat engine.
The earlier 2.0 JTD was infact a PSA Hdi engine, and so the Dispatch, Expert & Scudo were identical mechanically apart from badges and trim options. Citroen and Peugeot sold their vans with dual passenger seat as standard (optional extra was a single passenger seat) but Fiat sold their van as standard with a single passenger seat (although most Fiat dealers ordered their vans with a dual passenger seat and paid extra for that option.)
So if you need a dual passenger seat and you are buying a Fiat, then always check what option that van has.
Glased or unglased rear doors were a no cost option so second hand they could be either, although Fiat UK usually ordered stock items with unglased doors, whereas PSA seemed to order stock items with glased doors for some reason.
Although all 3 vans were identical, Peugeot was always perceived as the best van, Citroen 2nd with Fiat last. As they get older I don't see much difference in retail prices asked, but there seems to be more examples of Experts in better condition than Scudos, but that a personal observation made just recently when I was looking at them.