Actually, the 1st one's Peter LaGana made were natural-colored hickory handled, and bare metal with no special finish on it... 2nd type was similar to the 'Cold Steel' reproduction Vietnam Tomahawk (OD green all over). These are 1960's era tomahawks.
The newer LaGana models are from around the year 2000... the picture above looks like the earliest model. Then there is the current model, the ATC VTAC. Looks very similar to the picture above, but the handle is a bit different (Googe Images has pictures of this current model). I have another picture showing Peter LaGana in front of a display case (his personal tomahawk collection?), and he had different variations on the original (wooden handles). To the best of my knowledge, this is an accurate representation of the differences. I have pictures and video clips of Peter LaGana, but it would be easiest to email them to you directly.