I went and pulled actual numbers from those that posted their dyno charts.
Evo 8 weight was 3262. Evo 8 avg hp was 230 at the tires. Some were as low as 190 and as high as 240.
03 Cobra weighes 3665. Avg rwhp was 370. Some as low as 360 and as high as 390.
Evo 8 - 230/3262=0.07
Cobra - 3665/370=0.10
Even if we bump up the hp to the highest on the Evo and cut its weight to 3000 lbs, and take an extra 10 hp off the lowest hp on the Cobra - the Cobra has better power to weight.
Evo 8 - 240/3000=0.08
Cobra - 350/3665=0.095
Its not even close.