Mediterranean Shipping Co (MSC)'s contract for six 22,000-teu containerships with Samsung Heavy Industries (SHI) is set to cost about $26m per vessel less than first announced — a move that hints at its choice of propulsion systems.

The initial contract value of KRW 1.118trn ($991m) has been downgraded to KRW 940.7bn, according to a regulatory filing by the Seoul-listed shipbuilder.