both the mustang and GTR are built to be all around grand touring (GT) sports cars.we've already beat each other up over the cobra VS GTR so I'm not going to open old wounds.
Yes, your right. Fact is, stock C5 will beat stock R33 GTR and I suppose R32, R34 as well. But start modding and I'd want the GTR, but this is mostly personal preference. Both the C5 and GTR are 2 of my favorite "must have" cars of all time. Pitting the two against each other would be a bloody battle from hell!! (GTR will win though

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-Danny