I have heard that -
Lanemasters said that they stopped using diamonds as the particles in their coverstock because they couldn't get them in different sizes to produce different balls reactions. So I believe most Lanemasters brand and Legends brand particle balls now use what the call "Super Carbon" particles, which are very similar to diamonds, but which they can get in different sizes.
The Terminator coverstock is supposedly different from every other Laenmasters or Legends particle balls because its coverstock contains, or so I have heard, 2 different sized particles in the same ball.
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"None are so blind as those who will not see."