The two seasons in this case are those of 1717 and 1733. Instrumental music and opera arias highlight just how far Vivaldi's style had developed in the intervening time. For 1717, we hear the Sinfonia, a pair of arias from L'Incoronazione di Dario and one aria from Arsilda, revived that year, as well as the remarkable violin concerto Grosso Mogul, RV208. Then we go to 1733, with the violin concerto in B flat, RV367, its slow movement eloquently embellished, and two contrasting arias from Motezuma, plus the violin concerto in C, RV191. Throughout, the singing and playing are beautifully articulated.