well none of the cars being discussed are really lightweight cars per se. drive a lotus elise and you will realize what less weight can do for a car. it changes how a car can drive.
the 370 is lighter than the old 350 but i never have considered it a light car. Now the Mustang, camero and porker challenger are all heavier than the Z but the V8 versions of these cars do have quite a bit more power than the Z. The fact the Z stays so close in a straight drag race is what i consider a feather in the Zs hat.
remember when the 350 was compared to the other japan boys RX8 and S2k they called the 350 the muscle car of the bunch due to its torquey engine and higher weight.
I personally am not one for straight line speed. Its too one dimensional. an all arounder is what i look for. I want a car that can carry speed into a corner scrub it off transfer its weight well and come out of a corner on the power and still feel balanced.
This is where I believe the Mustang loses in MY book. its the damn live rear axle. Ford refuses to update this just like Porsche leaves the engine in the 911 in the wrong place and GM still uses pushrods from the 1950s
Now both these companies have refined these things into some great cars. 911 GT3 one of the best track cars they say (ive never driven). and what GM does with the LS engines is incredible. even though Benz gets a lot more power out of their modern 6.3L amg engine.
The mustang has made leaps in handling with their track pack mustangs it just doesnt feel like a car should to me. My driving style so I stick with the Z. If i could make a Lotus Elise/Extige work everyday i would but they are bloody impossible to get in and out of all the time. so again I prefer the Z. but thats just one mans opinion. I say again if mustang hadnt bought a 'stang I probably would not have gotten my 370 so its all about what the driver wants out of his car
ok step down off the soapbox. im not tell anyone they are right/wrong but thats my opinion and now we can discuss