Complex sentence: The chairs in the Bargello museum do use flame stitch motifs, but curved motifs are also common (see below), and these curved Bargello motifs would normally not be'flame stitch', but would be called "Bargello".
Split into simpler sentences: The chairs in the Bargello museum do use flame stitch motifs, but curved motifs are also common (see below). These curved Bargello motifs would normally not be "flame stitch", but would be called "Bargello".