taking bets on which one will break first.

Very impressive results, but would worry about the reliability of either drivetrain. Sad to say, but the Corvette trans and diff will probably last longer without upgrades.
The other thing I am noticing... the GT-R times look similar to what you have for lightly modded cars on 60' and 0-60. Clearly the advantage picked up by additional power is the upper gear acceleration. Still excited about the potential this car has to put down some ridiculous numbers for those brave (and rich) enough to dump money into making it go fast!