ArokaiRed Scarf III is a 96 key layout. It does not have the 10 function keys on the left side and also includes a number pad but there is not space between the alphas and the number pad so it's packed tightly.
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Red Scarf II+ (RS68 I believe) is just a 65% layout which is 60% plus the arrow cluster with 4 home keys.
Ver.B is the Red Scarf II with the added 10 function keys.
There are multiple versions of the Red Scarf II (Ver. A - F I believe). Each have it's own uniqueness. Examples: Added F keys (75% layout), Added number pad (without F key row), Added Number pad and 10 function keys (without F key row), and 2 more but I can't remember the exact layouts.
In case you were wondering, the Red Scarf I is just a number pad.