Here ya go.
1st pic is of the outside of the two diffs. The V6 is in the background. Note it has more ribs or fins. They're easy to distinguish when u know what to look for. What's inside is a different story....
2nd pic is a 4 cylinder diff, like a G292 (2 pinion)
3rd pic is a v6 diff, like a G294 (4 pinion). Note the turbo 4 cylinder diffs are v6 style housing, 2 pinion variety. At least the three trucks I've seen had G292 on the tag and the V6 housing. I don't think any of the turbo fours came with a G294.
JR