I don't think there were a whole lot of royal courts in Italy bsack then. Naples, and that's pretty much it, unless you count the Vatican.
Courts were full of courtiers, most of which were noblemen and noblewomen brought up to the manner, more or less. Altogether, they were probably a bit less crude and loud than the English aristocrats, but just as violent and quite happy to play hard.
An Italian court, though, at that point gained a great deal of prestige from patronage of the arts, so it would have been filled with artists, musicians and scholars, inhabiting the rung below the courtiers proper. That was something that set Italy apart at the time, though it was moving into the rest of Europe. But these men (except for the scholar-courtiers of noble birth or ecclesiastical rank) were more paid entertainment than true equals.