The turbo needs load. The concept behind taller gears is, the more you load a turbo the more it will spool up. Take a diesel for example, when they start to climb a hill with no load on the trailer, they don't spool up as much and you don't hear the whistle from the turbo. Now load that truck down, and as the truck is trying to climb the hill the turbo will spool up , the engine isn't necessarily making more rpms, it's just being loaded more. Just my opinion.
On the truck you speak of, I've actually been in a race where two identical trucks, even the same color, one with 3.73's and the other with 4.10's, the 4.10's would take the other off the line about 1/2 a truck length, then as mid 1st gear came along, the 3.73 truck would pull ahead a truck length, because he was able to stretch 1st longer, it was like this all the way through third, the 3.73 stayed a head but very little.
On the highway, the 3.73 would pull harder and win. I can vouch for that, my 4.10's were ok on the highway, but nothing compared to the 3.42's I used to have.
Matter of fact, my 3.07's would beat the 3.42's on the highway.
Now add a turbo to that race. I think it would be almost the same, but with the 3.73 truck ahead even more. The 3.73 truck would pull longer and harder, not having to shift, now add a turbo that loves rpms and load.

In my opinion, the 3.73's would win in the 1/4 mile. I think a 3.42 truck with a turbo would beat a 3.73 truck with a turbo in the 1/4 mile as well.
You said the trucks would have a 3000stall converter, that makes up for the take off the 3.73's would lack.

Either way, both will haul ass.

good luck,

allen