Most rare—. Robeson USMC or KA-BAR First Generation?

[TMiles13]

I am less than a year into collecting WW2 knives.  My Father enlisted at 18 and he left me his KA-BAR, which started my journey.  The Robeson is hailed as the most rare and desirable MK 2 by many folks, and I understand why to a

good extent.   What is interesting is that I see more Robesons up for sale than the red/black/red pommel spacers of the first gen KA-BAR.   Given the supply vacuum for the KA-BAR is it the more sought after, rare knife?