Low range or locking diffs?

[Major Fallout]

Hypothetical 2 identical cars automatic 4x4 300bhp diesel loads of torque, but one has a low range reduction box and the other has locking difs.
You have to drive across a muddy flat feild, not a race just have to get across it.

So what would you choose.
Personally and I have no experience off roaring I would chose the locking diff car.