The MPG seems to be about the same... but the VG is supposed to run premium... and the LS (at least the 2001 camaro SS) only needs regular.

comparing the 300zx to a camaro ss, they both weight right at 3,000 pounds (give or take a bit depending on who you ask) the general consensus is, that a 300whp 300ZX should get right around 20 mpg, mixed, casual driving. And the same thing with the Camaro, however, people with the 6 speed tranny talk about getting mid to high 20's when it is mostly interstate.

The Kicker is, it looks like when you up the power on the VGTT, you pretty much kick MPG in the nuts. The guys running around in the 400-450 range, appear to get between 15-18. BUT, the camaro guys in that same power range still claim to get 18-20 and into the mid 20's on the interstate. That 6th gear seems to be the trick. They say that do 80 mph at 1,800 rpms.

As far as power goes... It is looking like the LS option is going to be more fun to drive. Making boat loads of torque at low RPMs.
Both engines have their potential.

the NA VG option is going to cost as much, but is going to get bad MPG and have a pretty peaky power curve. Going to have to rev the snot out of it to get it to move its ass.

So now it is basically down the the dollars and cents of it.
Both options are viable options. Both suit the requirements. The LS seems to be a slightly better fit.
so which one is going to cost less. Doing a TT swap, or LSx swap?