The one on the right, no. 96 is one of the first generation TGV units of the so called TGV Sud-Est series.
They were built by what then was GEC-Alsthom between 1878 and 1988 in 111 copies. Many have been scrapped already. It is a ten car set
with a seating capacity for 350 passengers. 9 sets have a three current setup for 1,5 kV DC, 25 kV AC and Swiss 15,6 kV AC, but most have
dual current systems.
The train on the left, no. 4306 is a Thalys PBKA TGV. PBKA stands for Paris-Brussels-Köln-Amsterdam. They are quadri-current, operating
under 25 kV, 50 Hz AC (LGVs), 15 kV 16⅔ Hz AC (Germany, Switzerland), 3 kV DC (Belgium) and 1.5 kV DC (Dutch and French lignes classiques).
Picture from Paris Gare du Nord 27.1.2008 by Sanna Siissalo.