I opened up the 16168625 pcm I have and compared it to them as well. All the small little parts that were different colors between the 6395 and 7427, were the same between the 6395 and 8625. Board and everything else was all laid out just the same on the 8625, only big difference in the 8625 was it had two extra round red disc thingys. The 6395 and 7427 had the spots on the borad for them, but nothing was in them.