Board Thread:Questions and Answers/@comment-24366751-20170319230341/@comment-24922135-20170321213131

The Andromeda aliens are shown to be just clones of the originals with little-to-no variation at all since the Omnitrix wouldn't be able to determine what the 'ideal' version of those species would be due to having only encountered one of each before.

NRG does seem to be a bit different however, as his suit is far easier to open than P'andor's was.