Are you using local talent to lay the cable? I would generally assume you use the same crew and same boats all the way through, who probably dont want to be paid in local currency.
Probably not local talent/currency along the whole route. But if we are comparing to a project off the West Coast of the US where (I think) they'd be required to use a US flagged vessel and American crew, then it still should be far cheaper. And that's before environmental reviews, etc.