Yeah, probably 2 for 1. I'd stick with the P-40Q, had it been available. Also, if the P-40Q were being deployed to theaters flying P-40s, then the mechanics would not have had to be retrained completely. All in all, the P-40Q still looks to me like it should have been built ... but should have been built a year earlier.
Yes, I know it didn't happen, and the P-40Q is also in good company as being a good one that was not adopted. And I'm talking about possible deliveries in mid 1943, not in 1944, so the P-38's price would be higher. A P-38 cost $120,407 in 1942 and $105,567 in 1943 while the P-40 was $59,444 in 1942 (1/2 a P-38 ) and $49,449 (1/2 a P-38 ) in 1943.
That assumes, of course, that you could get Curtiss to expend the effort a year earlier. There was no technology change, just an overall cleanup.