The Saxo has a sunroof but it is a 2000 model. The blind is a proper fibreboard affair which keeps out all the direct sun but also blocks any vision. vision is not that good anyway since the glass is tinted.
The Giulietta has air con and is a 2011 model.
I think it is a case of either/or since there is little point in having both. Air con is, of course, much more efficient at keeping the car cool on a sunny day especially if you have the blind closed on the sunroof to prevent sunburn on a bald head (like mine)
Most fleet or company car specifiers will always opt for air con as it is deemed more upmarket (it has lots more moving parts, things to go wrong and costs more) hence there has been a dearth of cars with sunroofs on the used car market since four years after aircon become readily available in mass market vehicles.