Yes for sure they are flying the A340-300E. They will use it on YYZ to DEL and YVR to DEL and YYZ to Punta Cana(spelling). The Aircraft was never taken up by Sabena.
Here is a Quote from the YYZ news.
One of the new Airbus A340-300 ordered by Sabena (nº395) and noted in Toulouse in white colors with the engines painted in Sabena colors was purchased by ILFC and will be leased to Canada 3000.
The plane arrives in september and wil be doing Transatlantic flights from YYZ while the pilots finish their line-indoc then in mid october it begins YYZ-DEL-YVR-DEL-YYZ-DEL-YYZ-Punta Canada and back to YYZ for to start the new week.
"Clive Beddoe says he favours competition, but his actions do not support that idea." Robert Milton - CEO Air Canada