FR 6974 then IB 5374 at Barcelona
Rome → Barcelona → Firenze
Timetable, Barcelona time
22:25FR 6974 from Rome at the gate
12:45IB 5374 to Firenze leaves the gatealso LL 5374, VY 6074
14 h 20 apart on the timetable, overnight
IB 5374 leaves 14 h 20 after FR 6974 arrives on the timetable: more than half a day, so not a connection we count.