I was pretty sure they were the same product with two different brand names. To confirm this, I just went through HSP's last 10Q, here they are on page 21:
Celltrion completed its biosimilar development program for infliximab and submitted a dossier, and Hospira submitted a duplicate dossier, to the European Medicines Agency (“EMA”) in the first half of 2012. Celltrion submitted two dossiers for infliximab to Health Canada in late 2012;