I am not sure how being an inline makes any difference in torque, but all of the inlines I have ever seen have one big advantage, and that is crankshaft support.
On an inline, you have a crankcase journal between every piston, whereas on a VEE type engine there are two connecting rods between every crankcase journal.
I wonder if there has been a study made by the big engine manufacturers, which states if the inlines are any less prone to crankshaft failure???
International has manufactured a number of good engines in the past, but the 6.0L diesel definitely killed there image.
The DT466E, and the 7.3L are far better engines both in terms of maintenance and reliability