The chip on the left is an older one. The chip on the right was a re issue. Both you can find a concentric. Both are OBS now too. They have a white ring now. It was the back up chip...

These color variations kill me. lol IMO they are all the same chip. Yea the color is a little different but meant to be the same I think,. Plus the 1st ones have 20 years of dirt on them... If you need either one im sure I have it here.