Will it hurt the original cars worth or no change being that these are being offered ?
Absolutely not. In addition to obvious differences in tooling details and printing quality between the current MTL models and the original Kadee models from 40 years ago, the artwork is being modified to correct any deco errors of the Original Nine. And, as always, the reporting marks will be different.
Keep in mind that most of the Original Nine have been reprinted at least once under the MTL banner in the past 30 years. Some of them have been released as multi-packs (either two, three, five, or six-packs). Some even have been released under their original Kadee stock numbers. So this isn't the first time that the schemes have been reissued.